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Hundreds of Black Holes Found

eldavojohn writes "Hundreds of black holes that were thought to exist at the beginning of the universe have been found by NASA's Spitzer and Chandra space telescopes. From the article, 'The findings are also the first direct evidence that most, if not all, massive galaxies in the distant universe spent their youths building monstrous black holes at their cores. For decades, a large population of active black holes has been considered missing. These highly energetic structures belong to a class of black holes called quasars. A quasar consists of a doughnut-shaped cloud of gas and dust that surrounds and feeds a budding supermassive black hole. As the gas and dust are devoured by the black hole, they heat up and shoot out X-rays. Those X-rays can be detected as a general glow in space, but often the quasars themselves can't be seen directly because dust and gas blocks them from our view.' This is pretty big, as it's empirical evidence proving the existence of objects that theoretically had to exist but could not be detected previously."

208 comments

  1. Had to exist? by Misanthrope · · Score: 3, Insightful

    Not to be pedantic, but couldn't there be another source for the x-rays? What would've happened if this was someones pet theory?

    1. Re:Had to exist? by alexborges · · Score: 3, Funny

      Im not gonna mod you. Could not find a +/- 1 "claims to be pedantic"

      --
      NO SIG
    2. Re:Had to exist? by Anonymous Coward · · Score: 2, Interesting

      Well yes. But it'd have to be a source that generated fantastically intense beams of x-rays, and which had masses of hundreds of millions to billions of times the mass of a star in a fantastically small volume to keep stars in galactic cores moving at ludicrious speed. High density + invisible is something of a puzzle in astronomy.

    3. Re:Had to exist? by Anonymous Coward · · Score: 1, Funny

      Ah. The good ol' Schrödinvote.

    4. Re: Had to exist? by Black+Parrot · · Score: 2, Insightful

      Not to be pedantic, but couldn't there be another source for the x-rays? What would've happened if this was someones pet theory? If there were competing theories that predicted the same thing, the race would be on to see whether there was something else they made different predictions about, and to see which could stand up to the additional scrutiny.
      --
      Sheesh, evil *and* a jerk. -- Jade
    5. Re:Had to exist? by fireforadrymouth · · Score: 1

      NFSW! (though I could see it coming)

    6. Re: Had to exist? by pedestrian+crossing · · Score: 4, Interesting

      Not to be pedantic, but couldn't there be another source for the x-rays? What would've happened if this was someones pet theory?
      If there were competing theories that predicted the same thing, the race would be on to see whether there was something else they made different predictions about, and to see which could stand up to the additional scrutiny.

      Like these?

      No one has ever "seen" a black hole, they are seeing effects that can be explained by black hole theory. A subtle but perhaps important difference.

      IANAAP, but on the surface of it, ECOs are interesting because they do not involve a singularity.

      --
      A house divided against itself cannot stand.
    7. Re: Had to exist? by Steeltoe · · Score: 4, Insightful

      Noone has ever "seen" an atom either, or a bunch of molecules.

      What did you think you were seeing but incoming photons triggering electrical pulses to your brain?

      Makes you think how little we do "see"..

    8. Re: Had to exist? by khallow · · Score: 2, Interesting

      As I see it, the only difference between a black hole and an ECO is whether you are in it or not. The point is black holes look like ECOs from the outside, up to emitted radiation and a magnetic field.

    9. Re:Had to exist? by WheelDweller · · Score: 1

      This is *exactly* the healty skepticism of a scientist. Just not of a Global Warming scientist. GoodOnYa!

      --
      --- For a good time mail uce@ftc.gov
    10. Re: Had to exist? by howard_coward · · Score: 1

      No one has ever seen a dog either, they are seeing neurochemical effects that can be explained by nearby-dog theory. A subtle but basically stupid difference.

    11. Re: Had to exist? by INowRegretThesePosts · · Score: 1

      Read the Wikipedia article again (at least the introduction!)

    12. Re: Had to exist? by arfonrg · · Score: 1

      Noone has ever "seen" an atom either, or a bunch of molecules.

      I've seen 38 atoms.... IBM made a logo out of a few and took a picture...

      http://www.nanomedicine.com/NMI/Figures/2.25.jpg

      --
      Your thin skin doesn't make me a troll
    13. Re: Had to exist? by khallow · · Score: 2, Informative

      Glancing through the article some more, I grant that I am somewhat incorrect. The key difference is that an ECO will decay much faster than a pure black hole with no photon radiation pressure would. Recall that we still have Hawkings radiation to eventually eliminate the massive object. Also recall that a considerable portion of the mass of some massive objects (particular those in the center of galaxies) might have a large "dark matter" component which in turn might be matter that won't convert into photons or other massless particles.

    14. Re: Had to exist? by greyhueofdoubt · · Score: 1

      Can I buy pot from you? ;)

      --
      No offense, but I've stopped responding to AC's.
    15. Re:Had to exist? by docteur_j · · Score: 1

      Or perhaps black holes are really just instances of this: http://en.wikipedia.org/wiki/Dyson_Sphere a.k.a. Hyper Advanced Civilizations. And the x-rays are the electrical waste of said civilizations.

    16. Re: Had to exist? by amRadioHed · · Score: 1

      IANAAP, but on the surface of it, ECOs are interesting because they do not involve a singularity. ...and black holes are interesting because they do involve a singularity.
      --
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    17. Re: Had to exist? by Anonymous Coward · · Score: 0

      Using the same reasoning you are using, I can prove the following:

      "No one has seen God" => "God exists".

      This is an interesting method of proof that I will utilize in various aspects of my work. I hope to name it "Proof by non-sequitor".

    18. Re: Had to exist? by pedestrian+crossing · · Score: 1

      ...and black holes are interesting because they do involve a singularity.

      My point is that ECOs are a way of explaining these objects without invoking a singularity. Personally I think that the need to invoke singularities is a symptom that a physical model is broken.

      "Suddenly, everything goes to infinity!" Yeah, right....

      --
      A house divided against itself cannot stand.
    19. Re: Had to exist? by pedestrian+crossing · · Score: 1

      Um, you're going a little too metaphysical here.

      Using telescopes, we "see" stars and galaxies. Using x-ray telescopes, we "see" areas that are bright in x-rays and deduce that they are caused by matter falling into very massive objects.

      Almost Everyone just accepts that these massive objects are "black holes" because it is a popular theory. Take the article for instance, it says we are "seeing" black holes.

      But we're not, we're "seeing" very massive objects, and from what we can see they could be modeled as black holes (model requires singularities), but they could just as consistanty be modeled as ECOs (model doesn't require singularities).

      Personally, I prefer a model that doesn't invoke singularities because I doubt that singularities truly exist in the physical universe.

      --
      A house divided against itself cannot stand.
    20. Re: Had to exist? by pseudochaos · · Score: 1

      Black holes don't presuppose singularities (unless you buy that whole 'bending of spacetime' hoopla). The laws of physics don't necessarily change in black holes, but because of their gravimetric impact (particularly upon radiation) we wouldn't know if they did.

      --
      "It is the mark of an educated mind to be able to entertain a thought without accepting it." - Aristotle
  2. Comment removed by account_deleted · · Score: 2, Funny

    Comment removed based on user account deletion

  3. Yeah, you didn't know that? by Anonymous Coward · · Score: 0

    Yeah, you didn't know that?

    I saw these with my backyard telescope the other day, forgot to mention it to NASA though... oops, maybe next time.

  4. Not to be confused with Red Holes by BadAnalogyGuy · · Score: 2, Funny

    Despite sharing gas clouds and the emission of toxic energy, quasars are found in space while red holes are found near Taco Bells.

    1. Re:Not to be confused with Red Holes by Hao+Wu · · Score: 1

      As the gas and dust are devoured by the black hole, they heat up and shoot out X-rays.
      These sound like giant holes to devour.

      I can't wait to see hi-resolution images of these massive "gassholes" in action.

      --
      I suggest you read Slashdot
    2. Re:Not to be confused with Red Holes by rts008 · · Score: 1

      "I can't wait to see hi-resolution images of these massive "gassholes" in action."

      If you have your own telescope and camera setup, just check out Uranus after a day of bad burritos and beer....or was that bad beer and burritos?...or was that bad burritos and bad beer?....I'm sooo confused now!

      --
      Down With Slashdot BETA!!! I've been around the corner and seen the oliphant; you can only abuse me from your perspecti
    3. Re:Not to be confused with Red Holes by erKURITA · · Score: 0

      Now you're thinking with goats-

      I mean, Portals

    4. Re:Not to be confused with Red Holes by Anonymous Coward · · Score: 0

      I believe goatse would help you in that department.

  5. it's funny because it's true by User+956 · · Score: 4, Funny

    'The findings are also the first direct evidence that most, if not all, massive galaxies in the distant universe spent their youths building monstrous black holes at their cores.

    That's funny, because I've heard the same thing about Dick Cheney.

    --
    The theory of relativity doesn't work right in Arkansas.
    1. Re:it's funny because it's true by Savage-Rabbit · · Score: 1

      'The findings are also the first direct evidence that most, if not all, massive galaxies in the distant universe spent their youths building monstrous black holes at their cores. That's funny, because I've heard the same thing about Dick Cheney. So if Dick Cheney is a doughnut-shaped cloud of gas and dust of with a black hole at his center does that mean that George Bush is the black nothingness Cheney exists in?
      --
      Only to idiots, are orders laws.
      -- Henning von Tresckow
    2. Re:it's funny because it's true by Torvaun · · Score: 2, Funny

      Close, but Bush's black nothingness is currently being contained by his skull.

      --
      I see your informative link, and raise you a pithy comment.
  6. *phew* by AlphaDrake · · Score: 5, Interesting

    I was scared I might have run into one in a dark alley one night, thank goodness they have been found. On a more serious note, the article mentions that "the galaxies are 9-11 billion years old, and that they *did* exist when the universe was in it's adolescence." Does this mean they are no longer there? And if not, what would have become of the black holes?

    1. Re:*phew* by Xzzy · · Score: 0

      what would have become of the black holes?

      They got plastic surgery, built a playground ranch in California, and became white.

    2. Re:*phew* by gabriel.dain · · Score: 1

      That "did" you emphasize doesn't mean the statement is not true now.
      As I understand it, the x-rays are reaching our telescopes now with a 9-11 billion light-year delay. We are seeing these quasars in their infancy/reaching maturity. We can only make assumptions about their status today.

    3. Re:*phew* by o_mighty_Halfjack · · Score: 1

      More seriously, What likely happened is that the ancient black holes, like all black holes, evaprated away into "hawking radiation" its a wierd phenomenon in which virtual particles that form right at the edge of a black holes event horizon do not self-annihilate, because either the particle or its antimatter twin gets sucked into the black hole. the end result is that matter and energy are being emitted by the black hole right at the edge of its event horizon. not a lot, mind you, but over 9 billion years it could really add up.

    4. Re:*phew* by Synonymous+Bosch · · Score: 1

      If they were black holes 9 billion years ago, it's entirely possible they're no longer there now

    5. Re:*phew* by hde226868 · · Score: 2, Informative

      The black holes seen by Spitzer are supermassive black holes (i.e., black holes with a few million solar masses). These black holes will not evaporate for a long time.
      What is generally taken to be the reason that the density of Active Galaxies is less high currently than at higher redshifts in the earlier universe is that the matter required to fuel the Active Galaxies is exhausted. This does not mean that these black holes do not exist anymore, just that it is virtually impossible to detect them. But the general assumption of most astrophysicists is that they are still around and in the centers of most, if not all, galaxies. For example, our own Milky Way has a supermassive black hole at its center. Its brightness is very low, so were this black hole not so close, relatively speaking, we would not be able to detect it at all.

    6. Re:*phew* by Anonymous Coward · · Score: 0

      "the galaxies are 9-11 billion years old"

      Well, we know that 9-11 changed everything.

    7. Re:*phew* by Enrique1218 · · Score: 1

      Does circling the drain mean anything? Oh wait, that is us. No, they are expected to evaporate eons eons eons into the future.

      --
      You don't have to be smart to use a Mac, you just have to be smart enough to buy one
    8. Re:*phew* by MBGMorden · · Score: 1

      Black holes do indeed "evaporate" over time due to Hawking radiation, but 9 billion years isn't close to long enough for ANY black holes formed by conventional means to have evaporated yet. If you read the Wiki entry on Heath Death, it estimates that the first black holes will be starting to dissipate at around 10^100 years (10 with 100 more zeroes behind it - WAYYYY longer than 9 billion :)), and the supermassive black holes will likely be gone by 10^150 years.

      --
      "People who think they know everything are very annoying to those of us who do."-Mark Twain
    9. Re:*phew* by PhetusPolice · · Score: 1

      Black holes don't last forever. They emit Hawking Radiation, meaning they lose their thermal energy over time. Lose enough energy, and you lose your black-holiness. I'm not exactly saying this is what became of most of the black holes that we see from our early universe, but I do know that black holes can wear out.

    10. Re:*phew* by Anonymous Coward · · Score: 0

      Time to revoke a Nerd license?
      Seriously, check Wikipedia for Hawking Radiation http://en.wikipedia.org/wiki/Hawking_radiation the bigger they are the harder they fall ... no wait, the bigger they are the more they evaporate!

  7. no-not-the-view-studio-audience? by Anonymous Coward · · Score: 0

    I am confused about the intended meaning of the dept. appellation for this story: "no-not-the-view-studio-audience". Can someone please edify me as to the proper parsing of this humor?

    1. Re:no-not-the-view-studio-audience? by Kadin2048 · · Score: 1

      It's a really terrible daytime television talk show in the U.S.:
      http://en.wikipedia.org/wiki/The_View

      One of the hosts is Whoopi Goldberg. I'll leave the rest as an exercise for the reader.

      --
      "Ladies and gentlemen, my killbot features Lotus Notes and a machine gun. It is the finest available."
  8. Let me be the first to say ....... by Anonymous Coward · · Score: 0

    Hot damn, we're fucked.

  9. pics or it didn't happen by weirdcrashingnoises · · Score: 5, Funny

    "Those X-rays can be detected as a general glow in space, but often the quasars themselves can't be seen directly because dust and gas blocks them from our view."

    pfft yea sure, i'll believe it's a black hole when i see it.

    --
    sigs... don't talk to me about sigs....
    1. Re:pics or it didn't happen by clsours · · Score: 2, Funny

      Does hurriedly photoshopped mspaint-style art count, or do you want genuine blurry photographic evidence http://www.nasa.gov/images/content/194195main_A-ssc2007-17a1-330.jpg?

      --
      Seagoon: Shut up Eccles!

      Eccles: Shut up Eccles!
    2. Re:pics or it didn't happen by swordfishBob · · Score: 1
      i'll believe it's a black hole when i see it.

      Why do you think they were "missing" for so long??

      --
      -- All your bass are below two Hz
    3. Re:pics or it didn't happen by Anonymous Coward · · Score: 0

      /me points to the goatse guy.

  10. What does the red spectrum tell us about quasars? by Anonymous Coward · · Score: 1, Funny

    RIMMER: My answer: In answering the question, "What does the red spectrum tell us about quasars?" there are various words that need to be defined. What is a spectrum, what is a red one, why is it red, and why is it so frequently linked with quasars?

    He pauses and looks puzzled.

    RIMMER: What the hell is a quasar? Just put a neat cross through it and we'll do the next one, OK?

  11. Suddenly... by KillzoneNET · · Score: 2, Funny

    Suddenly black holes, lots of them!

  12. Ships in the night by Anonymous Coward · · Score: 0

    What happens when two or more black holes collide?

    1. Re:Ships in the night by Anonymous Coward · · Score: 0

      What happens when two or more black holes collide?
      a lot of shit
  13. Re:Huh? by smittyoneeach · · Score: 4, Funny

    No, this just proves that, for certain empirical cases, the difference between theory and practice is smaller in practice than certain other theoretically challenged cases: in other words, this one is rather similar, while still remaining slightly different.

    --
    Get thee glass eyes, and, like a scurvy politician, seem to see things thou dost not.--King Lear
  14. Question by thatskinnyguy · · Score: 2, Interesting

    I may be totally inept at this whole astronomy thing, but I am curious. If all or most galaxies have black holes at the center, where does the debris and dust and all the other stuff that makes a galaxy work come from? Obviously the black hole is pulling stuff toward it, but where does that stuff come from? And how did it get there?

    --
    The game.
    1. Re:Question by Anonymous Coward · · Score: 0

      The Big Bang.

    2. Re:Question by gabriel.dain · · Score: 1
      From TFW(ebsite):

      Dusty grains - including tiny specks of the minerals found in the gemstones peridot, sapphires and rubies - can be seen blowing in the winds of a quasar, or active black hole, in this artist's concept. The quasar is at the center of a distant galaxy.
      Astronomers using NASA's Spitzer Space Telescope found evidence that such quasar winds might have forged these dusty particles in the very early universe. The findings are another clue in an ongoing cosmic mystery: where did all the dust in our young universe come from?
      Dust is crucial for efficient star formation as it allows the giant clouds where stars are born to cool quickly and collapse into new stars. Once a star has formed, dust is also needed to make planets and living creatures. Dust has been seen as far back as when the universe was less than a tenth of its current age, but how did it get there? Most dust in our current epoch forms in the winds of evolved stars that did not exist when the universe was young.
      Theorists had predicted that winds from quasars growing in the centers of distant galaxies might be a source of this dust. While the environment close to a quasar is too hot for large molecules like dust grains to survive, dust has been found in the cooler, outer regions. Astronomers now have evidence that dust is created in these outer winds.
      Using Spitzer's infrared spectrograph instrument, scientists found a wealth of dust grains in a quasar called PG2112+059 located at the center of a galaxy 8 billion light-years away. The grains - including corundum (sapphires and rubies); forsterite (peridot); and periclase (naturally occurring in marble) - are not typically found in galaxies without quasars, suggesting they might have been freshly formed in the quasar's winds. So the question that follows is; how were these dust-creating quasar formed in a dustless universe?
    3. Re:Question by CodeBuster · · Score: 4, Informative

      but where does that stuff come from? And how did it get there?

      IANAA (I am not an astrophysicist) but I seem to remember, from the astronomy course which I took for fun in college, that stars formed out of hydrogen present after the big bang (the hydrogen formed soon after everything cooled down enough to allow protons and electrons to bind together again) which formed stars due to minute temperature variations throughout the universe (apparently if the temperature were entirely uniform then nothing interesting, including ultimately Humans, would ever have formed out of the large soup of hydrogen that was left over).

      Now, depending upon the initial mass of a star and its final disposition (white dwarf, brown dwarf, neutron star, supernova, black hole) which depends upon that mass, the star creates ever heavier elements as the fusion of hydrogen into helium progresses into the fusion of Helium into Lithium and Lithium into Boron and so on all the way up to Iron (which is the heaviest element that can be produced by fusion). The elements that are heavier than Iron are produced in the massive pressure and forces generated by novas and super novas. Obviously this process has happened over and over again as matter and stars coalesced by gravitational attraction into the galaxies that we see today (lots of handwaving here, again IANAA).

      Now, to answer your question, since dust is probably mostly carbon type stuff and compounds (which form pretty often in giant red stars) then over time as stars form and explode and form and explode and form and turn into black holes there will ultimately be some black holes surrounded by stray gases and dust from its own nova or surrounding novas or nearby stars over large periods of time. Lots of handwaving here, but does this answer your question?

    4. Re:Question by NeoSkink · · Score: 5, Insightful

      Just because it's a black hole, doesn't mean it has to suck everything around it in. Stuff that's close enough, sure, but you can still get a stable orbit around a black hole, just like you can around any other collection of mass.

    5. Re:Question by bigmaddog · · Score: 1

      That question does not follow. As the section you quoted states and you repeat in your question, quasars are the theoretical source of the dust that cannot be otherwise attributed to old stars. Where did you get the impression that the absence of dust impedes quasar formation?

      --

      Even as you read this, your pants are strangling your loins! Aaa!

    6. Re:Question by BungaDunga · · Score: 1

      I read somewhere that if the sun were to compress to a black hole tomorrow, we'd still be orbiting. Makes sense, but semi counterintuitive (but I thought all black holes sucked?! etc).

    7. Re:Question by mazarin5 · · Score: 5, Informative

      I read somewhere that if the sun were to compress to a black hole tomorrow, we'd still be orbiting. Makes sense, but semi counterintuitive (but I thought all black holes sucked?! etc). Quite true. The big deal with black holes is that the escape velocity exceeds the speed of light, at some radius that is larger than the object. The distance at which the escape velocity is equal to the speed of light is called the Schwarzchild radius. If the Sun were a black hole, that radius would be about 3 km. Everything outside of that would be fine.

      google example Replace the mass with any interesting value.
      --
      Fnord.
    8. Re:Question by teebob21 · · Score: 4, Interesting

      Interesting Google calc link. In a related vein, a black hole with the mass of Pluto would have an event horizon (Schwartzchild radius) of only 20 microns, or about the width of a hair on your arm. If it were somehow accelerated to a relativistic speed (> 0.95c), such a black hole could theoretically impact a star/planet/moon and pass right through. The only damage would be the curious 20 micron wide tunnel that suddenly appeared in the celestial body. All other matter on the planet would not be sucked in, although any inhabitants might experience some strange gravitational effects. My first-year college physics professor was a big fan of exotic astronomy, and we did several projects involving similar scenarios.

      --
      khasim (12/9/06): In a blind taste test, more people preferred Coke over the Pepsi that I had previously pissed in.
    9. Re:Question by splerdu · · Score: 2, Informative

      Except, of course those micro-black holes couldn't exist, at least given our current understanding of stellar evolution. Post-supernova, without enough mass, neutron degeneracy will prevent the remains of our dead star from falling below the Schwartzchild radius. It's theorized that the minimum mass to form a black hole is about 2-3 times that of the sun, so the smallest black holes would probably have a 6km event horizon.

    10. Re:Question by ethergear · · Score: 1

      Now, depending upon the initial mass of a star and its final disposition (white dwarf, brown dwarf, neutron star, supernova, black hole) which depends upon that mass, the star creates ever heavier elements as the fusion of hydrogen into helium progresses into the fusion of Helium into Lithium and Lithium into Boron and so on all the way up to Iron (which is the heaviest element that can be produced by fusion).


      Not quite true - heavier elements can indeed be formed by fusion, but such reactions yield less energy than it took to initiate them, i.e., such reactions consume energy. This is one of the reasons very large stars can collapse violently enough to cause a supernova.
    11. Re:Question by Anonymous Coward · · Score: 0

      That guy's name is Schwarzschild as in shield, not child.

    12. Re:Question by Markrian · · Score: 1

      In fact, in classical Newtonian gravity, a stable circular orbit of any radius can be achieved by a test particle around a massive body. In general relativity, however, around extremely massive bodies such as black holes, there is a minimum radius below which no stable circular orbit can be formed. The location of this minimal radius will be somewhere between the object's Schwarzschild radius and a few times that, depending on the degree of the body's rotation.

    13. Re:Question by Markrian · · Score: 1

      Just to be clear, the location of this minimal radius is *not* the same as its event horizon.

    14. Re:Question by Rick+Genter · · Score: 1

      Except, of course those micro-black holes couldn't exist, at least given our current understanding of stellar evolution. Post-supernova, without enough mass, neutron degeneracy will prevent the remains of our dead star from falling below the Schwartzchild radius. It's theorized that the minimum mass to form a black hole is about 2-3 times that of the sun, so the smallest black holes would probably have a 6km event horizon.


      Not due to stellar evolution, but it has been theorized that such black holes could have been created as part of the Big Bang.
      --
      Don't underestimate the power of The Source
    15. Re:Question by suv4x4 · · Score: 2, Insightful

      IANAA (I am not an astrophysicist)

      Don't you think people the utility of abbreviations is kinda lost when you have to put the full thing in parens immediately following?

    16. Re:Question by Luyseyal · · Score: 1

      I thought that cosmic rays impacting the Earth's atmosphere created micro-black holes but that they immediately disintegrate due to Hawking radiation.

      -l

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    17. Re:Question by mstahl · · Score: 1

      There has been a lot of speculation that this is what caused the Tunguska event.

    18. Re:Question by Anonymous Coward · · Score: 0

      eh?? maybe he wanted to make sure no-one translated the acronym to I Am Not An Asshole???

    19. Re:Question by celtic_hackr · · Score: 1

      IAAAP, by education only.

      Blackholes spin very rapidly.
      Think of a blackhole as a modified double whirlpool.
      Any matter or light that enters into it's whirlpool (event horizon) is sucked in, compressed under horrendous
      pressure and spit out along it's axis in tiny pieces ... eventually.

      It's a lot like those spinning-art-making-thing-a-mabobs in carnivals.
      Matter (paint) comes in from the top (or bottom) and gets spit out perpendicularly, more or less.

      Or a 90 degree shredder, although I've never seen one of those. Could be dangerous.

    20. Re:Question by Tranzistors · · Score: 1

      If I remember correctly, Hawking predicted that small enough black holes would evaporate quite fast. I was wondering, if you would know, if black hole of Pluto wouldn't evaporate before it could be interesting enough for theoretical experiments?

    21. Re:Question by Lost+Race · · Score: 1

      If the Sun were a black hole, that radius would be about 3 km. Everything outside of that would be fine.
      Just watch out for tidal stresses when you start getting close to the limit!
    22. Re:Question by pimpimpim · · Score: 1

      Whoa, could this kill you? That would be a cool death, pierced head to toe by serveral micron wide black hole.

      --
      molmod.com - computing tips from a molecular modeling
    23. Re:Question by RedBear · · Score: 1

      I may be totally inept at this whole astronomy thing, but I am curious. If all or most galaxies have black holes at the center, where does the debris and dust and all the other stuff that makes a galaxy work come from? Obviously the black hole is pulling stuff toward it, but where does that stuff come from? And how did it get there?

      The thing to remember is that, somewhat counter-intuitively, gravity is actually the weakest of the four known forces that hold the cosmos together. The other three forces are electro-magnetism and the "strong" and "weak" nuclear forces. Take a couple of magnetized iron paperweights. In close proximity their magnetic fields will attract each other quite strongly, to the point where you may not be able to hold them apart. On the other hand, I don't think sensitive enough equipment exists that could measure the gravitic attraction between the two paperweights, because it is infinitesimally weak in comparison. The only reason the paperweights "feel" heavy to us here on Earth is because of the huge mass of the Earth itself exerts a measurable gravitic attraction on objects. But despite the incredible mass of the Earth we only have to travel a relatively tiny distance away from its surface before the effects of its gravity become extremely weak. The Earth's magnetic field, on the other hand, can be measured from a very long distance away from the planet.

      According to theory, immediately after the Big Bang event the universe was simply a formless and uniform cloud of superhot matter. Shortly after that, tiny variations in the distribution of matter in the cloud caused clumping into distinct groups of matter which would also clump into smaller groups of matter that would eventually become galaxies and clusters of galaxies. Apparently a lot of these smaller clumps of matter had enough mass overall that somewhere at the center of the clump there was enough matter getting crushed together in one spot to form a black hole. Further consolidation of matter on smaller and smaller scales created all of the stars, planets and other objects we see in the universe today. That "galactic dust" so to speak is the source of everything, including us. It's the "stuff" that everything is made of.

      (Don't even ask what caused the Big Bang and where all the matter that appeared "came from", because nobody knows, and it's quite likely that no one ever will know since it's unlikely we will ever be able to gather any physical, observable evidence from a time before our physical universe existed. "And God said, Let there be Light" is technically just as good as anything you'll hear from a scientist on that particular issue. You'll have to make up your own mind about that. We only know what happened afterward.)

      Getting back to the fact that gravity is an extremely weak force. Yes, black holes have a very strong gravitational pull, since almost by necessity there must be a huge amount of matter in order for a black hole to be formed in the first place. But the creation of a black hole does not change the mass of the matter that came together and created it. The matter simply gets consolidated into a very small area. And, since the strength of the force of gravity increases more rapidly the closer you get to the center of mass, there comes a certain point where things seem to suddenly get "sucked in" when they approach a black hole. The phrase that comes to mind is "inversely by the square of the distance" or something like that. But all that is really happening is that the mass, and thus the gravitic attraction, is centered on a single very small point in space rather than spread out over a vast distributed cloud of matter. You could drive your spaceship right through the center of a pre-black hole cloud mass without feeling much of anything because the gravity is spread out over a wide area. But get too close to the same amount of mass that has become a black hole and WHAM! It's all over.

      Outside a certain distance, even the "pull" of a black hole

    24. Re:Question by pseudochaos · · Score: 1

      Why shouldn't it be? Given enough inertia a relatively large object should be able to escape what feeble photons can't. The only foreseeable problem is accelerating said object to the requisite velocity. I'm thinking a rail-gun-esque launch system might do the trick.

      --
      "It is the mark of an educated mind to be able to entertain a thought without accepting it." - Aristotle
    25. Re:Question by eh2o · · Score: 1

      If our sun were instantly transformed into a black hole of equal mass, all other things being equal, the earth would continue to orbit as normal. Contrary to ones initial intuition a black hole does not instantly pull everything towards it.

    26. Re:Question by eh2o · · Score: 1

      The minimum mass to *form* a black hole is 2-3 solar masses (i.e. the mass required to overcome neutron degeneracy pressure) but in theory, once formed, they can undergo evaporation, fall under that limit, and still retain the properties of a black hole.

      However it is unlikely to observe a micro black hole because their expected lifetime is extremely short -- the rate of evaporation due to Hawking radiation increases exponentially as the black hole loses mass -- at the end of its life this should increase in speed to the point where it explodes. Hawking predicted that a smallish black hole formed shortly after the big bang would be old enough to completely evaporate by about now, but this has not been observed thus far.

    27. Re:Question by eh2o · · Score: 1

      I think the words "some speculation" are more appropriate.

    28. Re:Question by mstahl · · Score: 1

      Semantic quibblings aside it's an interesting idea. Too bad the black hole theory is basically the one that least adequately explains what actually happened (for example: why was there no exit event?). I only brought it up because it's definitely the most creative of all the possibilities. I mean come on. A black hole collision is so much sexier than a mere comet explosion.

    29. Re:Question by teebob21 · · Score: 1

      I agree with you about the Hawking radiation causing an otherwise entirely theoretical micro-mini-black hole to evaporate before it could get anywhere. However, the Prof always justified the "existence" of his premise by invoking relativistic effects of time dilation on the rapidly moving micro-mini-black hole. If it were traveling fast enough relative to us, isn't it possible that (relative) time on the surface of the singularity could be slowed enough to permit it to travel a great galactic distance before the effects of Hawking radiation blew it to bits on the cosmic wind?

      Oh, by the way, those quiz questions were always extra credit - You'd get quarter credit if you just answered '42'.

      --
      khasim (12/9/06): In a blind taste test, more people preferred Coke over the Pepsi that I had previously pissed in.
  15. StdOverlord by VegeBrain · · Score: 0, Redundant

    I for one welcome our Black Hole overlords.

  16. What about Dark Matter/Energy by definate · · Score: 2, Interesting

    IANAP however it sounds as if this could have some affect on the Dark Matter/Energy theories. Since Dark Matter/Energy I believe was invented to balance out seemingly correct equations on a cosmic scale? Perhaps this accounts for the extra gravity holding a system together?

    Can any physicists elaborate on this for us.

    Thanks.

    --
    This is my footer. There are many like it, but this one is mine.
    1. Re:What about Dark Matter/Energy by chris411 · · Score: 2, Insightful

      IANAP either, but it hardly takes one to quickly check the article. "The massive, growing black holes, discovered by NASA's Spitzer and Chandra space telescopes, represent a large fraction of a long-sought missing population." They key points here are 'long-sought' and 'missing population.' They knew there were more black holes out there than they had detected up until now. That suggests to me they took this into account as far as the dark matter theory goes.

    2. Re:What about Dark Matter/Energy by Bloodoflethe · · Score: 1

      This is not necessarily true, unless we know the researchers mentioned are also proponents of Dark Matter/Energy. I only STFA (skimmed it) but I didn't see any indication either way.

      --
      "Little is much when little you need."
    3. Re:What about Dark Matter/Energy by Anonymous Coward · · Score: 0

      It's even simpler than that. These black holes are 10 billion light years away. The effect that was observed that led to the conclusion there must be some previously unknown effect or type of matter called "dark matter" was initially observed acting on single galaxies, that is scales of less than 100,000 light years, and acts like extra mass inside the galaxies, not outside. There is no way these black holes can create that effect.

      Dark energy would be a little more complicated. I don't know if the expansion has been measured that far out. If so, that would clear it up right there because these quasars would match the pattern. If not, accounting for dark energy in the form of these black holes still requires serious screwing with the current big bang theory.

    4. Re:What about Dark Matter/Energy by hde226868 · · Score: 2, Informative

      I am an astrophysicist, so let me try and explain in a little bit more detail why this result is so interesting.
      First of all: No, the discovery of these black holes has nothing to do with questions concerning the dark energy or missing mass. Note that one has to distinguish between dark energy or missing mass. What is meant by missing mass is the fact that in order to explain the rotation of many galaxies we need to invoke about 10 times more mass than what is found from observing the galaxies. What we do here is that we look at the rotation of the galaxies from which it is possible to infer their mass using simple dynamics arguments. In order to infer the mass present in a galaxy independently of the dynamics, you can simply make a picture of it. Since we know that typical stars have about the luminosity of the Sun it is then possible to calculate from the observed light how much radiating matter is present in the galaxy. It turns out that to explain the observed motions, about ten times more mass is required. Similar arguments also apply to galaxy clusters. This is what's called the missing mass.
      Dark energy, on the other hand, is a term proposed in the Einstein field equations, and therefore also in the Friedmann-Equations, which describe the expansion of the universe. With a so-called cosmological constant, these equations predict an accelerated expansion of the universe. It turns out that this is what's observed. About 85 percent of what is causing the curvature of the universe (the so-called Omega-parameter) is due to this cosmological constant, and many astronomers call the cosmological constant "dark energy". There is a nice plot by Mike Turner summarizing the different terms that need to be added to explain by the observed matter density of the universe.
      To turn to the question as to why we astronomers were looking for black holes enshrouded in gas: there is a long standing question about the number density of black holes in the universe. We know that in the local universe most galaxies, including our milky way, harbor a supermassive black hole in their center. These black holes are difficult to find since most are just sitting there, doing nothing. The mass of such a black hole is on the order of one million to one billion solar masses. This sounds a lot, but is really not very much: the typical radiating mass of a galaxy is 100 times more, and if you add the missing mass, then the supermassive black hole only contributes less than 0.1 per cent to the mass of the galaxy. So, on cosmological terms, the mass contained in these black holes is really negligable.
      What matters, however, is that models for the evolution of black holes predict that there should be a large number of black holes that are enshrouded in rather dense material in many galaxies. It has been difficult to detect these objects so far, since the dense material absorbs most radiation from the accreting black hole. With infrared observations with Spitzer that are summarized in the press release the Slashdot posting points to it has finally been possible to confirm the long-standing assumption that these black holes exist. What is the nice thing in all of this is that these observations confirm the predicted space density of black holes inferred from previous observations, which is a very nice and important result.

  17. Only Problem Is ... by pln2bz · · Score: 1, Flamebait

    Halton Arp discovered that quasars are in fact observed to be connected to or being ejected from spiral galaxies. Even though the mainstream theories badly need these objects to exist at the edge of space due to their high redshifts, more recent statistics demonstrate that Arp is probably right, and that redshift is not strictly an indication of distance.

    But the fact that there is any debate at all on it is rather silly. People can observe the images that Arp discusses and decide for themselves whether or not he is right. The real question is whether or not you believe somebody's math over your own eyes.

    --
    "A man cannot begin to learn that which he thinks he already knows." --Epictetus, 1st Century A.D.
    1. Re:Only Problem Is ... by Anonymous Coward · · Score: 0

      Stick to believing math. Your eyes lie. If you can show math lying, you'll have a place in history.

    2. Re: Only Problem Is ... by Black+Parrot · · Score: 1

      Halton Arp discovered that quasars are in fact observed to be connected to or being ejected from spiral galaxies. Even though the mainstream theories badly need these objects to exist at the edge of space due to their high redshifts, more recent statistics demonstrate that Arp is probably right, and that redshift is not strictly an indication of distance. Cite?

      FWIW, Wikipedia says it's Arp that's working with the 40 year old data.

      --
      Sheesh, evil *and* a jerk. -- Jade
    3. Re:Only Problem Is ... by Anonymous Coward · · Score: 0

      Arp derived his conclusions from outdated data. We are now seeing that the ratio of galaxies with supermassive black holes vs without far exceeds our expectations and furthermore, that the early universe harbored far more than expected.

      One tangible strike against Arp's intrinsic redshift theory came in the form of direct evidence that a supermassive black hole exists in the center of the milkyway and yet seems to cause none of the redshift that Arp would expect.

    4. Re:Only Problem Is ... by pln2bz · · Score: 1

      Stick to believing math. Your eyes lie. If you can show math lying, you'll have a place in history.

      It's not the eyes that lie. It's the brain. The brain wants things. It has preferences for and prejudices against theories. Our brains convince us what to believe by restricting our exposure to information. If something threatens our preferences or prejudices, we will refuse to let our eyes see it. So, in truth, the eyes are innocent bystanders.

      Many things that are real, natural and true can seem strange to our brains, and many things that seem normal to us will never in fact occur in nature. Nature has no such preferences or prejudices. It just is.
      --
      "A man cannot begin to learn that which he thinks he already knows." --Epictetus, 1st Century A.D.
    5. Re: Only Problem Is ... by pln2bz · · Score: 1

      I hope you are joking. Wikipedia is hardly an authoritative resource for controversial subjects. You need to get into the habit of making a distinction. If there is a heated debate about something, you will only get the mainstream view of it from wiki. Hopefully, there is no debate about this ...

      Wikipedia used to cite a paper that attempted to disprove Arp's observation of quantized inherent redshift. The thing is, the authors were not even aware that Arp's quantized redshifts were components of the total redshift. The authors disproved that the *raw* values were quantized. Apparently, so long as it is popular and disproves a heretic, accuracy is not all that important on wiki.

      As for the citation, it will not matter one bit. People will believe what they *want* to believe, and people *want* to believe that the statistics are flawed.

      --
      "A man cannot begin to learn that which he thinks he already knows." --Epictetus, 1st Century A.D.
    6. Re:Only Problem Is ... by pln2bz · · Score: 1

      Arp derived his conclusions from outdated data. We are now seeing that the ratio of galaxies with supermassive black holes vs without far exceeds our expectations and furthermore, that the early universe harbored far more than expected.

      There is a more recent study out there with an updated dataset, and it supports his conclusions. The thing is, nobody cares.

      One tangible strike against Arp's intrinsic redshift theory came in the form of direct evidence that a supermassive black hole exists in the center of the milkyway and yet seems to cause none of the redshift that Arp would expect.

      Arp argues that redshift is more an indication of an object's age than its distance, so I fail to see how the effect would be noticed with the core of our own galaxy. Only new objects -- the quasars being ejected from the supposed black holes -- would have a high redshift.

      This is hardly convincing logic though. The Sombrero Galaxy does not gravitationally lens either, even though it should. The mainstream theories have many problems of their own. But it is the only set of theories we teach to astrophysics students, so they are quite partial to it. People essentially decide to believe that redshift equals distance when they decide to go to school to learn astrophysics.
      --
      "A man cannot begin to learn that which he thinks he already knows." --Epictetus, 1st Century A.D.
    7. Re: Only Problem Is ... by Dragonslicer · · Score: 1

      I hope you are joking. Wikipedia is hardly an authoritative resource for controversial subjects. You need to get into the habit of making a distinction. If there is a heated debate about something, you will only get the mainstream view of it from wiki. Hopefully, there is no debate about this ...

      Wikipedia used to cite a paper that attempted to disprove Arp's observation of quantized inherent redshift. The thing is, the authors were not even aware that Arp's quantized redshifts were components of the total redshift. The authors disproved that the *raw* values were quantized. Apparently, so long as it is popular and disproves a heretic, accuracy is not all that important on wiki.

      As for the citation, it will not matter one bit. People will believe what they *want* to believe, and people *want* to believe that the statistics are flawed.
      And we should believe you instead of Wikipedia because...?
    8. Re:Only Problem Is ... by Lord+Ender · · Score: 1

      Your eyes and brain did not evolve to observe cosmic phenomena.

      --
      A slashdotter who didn't build his own computer is like a Jedi who didn't build his own lightsaber.
    9. Re: Only Problem Is ... by pln2bz · · Score: 1

      The real question is whether or not you and others would believe *any* study that demonstrates that objects can have inherent redshift. The typical argument that extraordinary claims require extraordinary proof is being misinterpreted to mean that no single piece of evidence can overturn the entire body of mathematical conjecture and observational interpretations associated with the popular theories. What people fail to realize is that there are indeed alternative cosmologies that can facilitate observations like Arp's, where speculation is not so rampant as to preclude multiple components to raw redshift values. But, by not considering those alternative cosmologies, it becomes easier for people to imagine that Arp's math is just wrong and that his observations are just "chance". This is nothing more than explaining away an inconvenient observation.

      --
      "A man cannot begin to learn that which he thinks he already knows." --Epictetus, 1st Century A.D.
    10. Re:Only Problem Is ... by pln2bz · · Score: 1

      Your eyes and brain did not evolve to observe cosmic phenomena.

      No, they evolved to feed us and multiply -- which by your own reasoning might suggest that you and I should not even be interacting on this forum right now. Arguments that minimize the adaptability of the human brain are antithetical to common sense.

      The truth is that your brain is searching for reasons to convince itself of the position that it has already decided to take: that the mainstream theories are correct. What would be more convincing is if you actually realized this, and then started compensating for it by investigating various heretical views in science, attempting to actually either prove or disprove them in at least a semi-objective manner. What most people do though is to just dismiss things as their system of belief's preferences and prejudices demand. Halton Arp is the classic example of this because his gallery of peculiar galaxies demands at least a reasonable discussion within the astrophysical community. The mathematics of the situation can never completely dismiss the images that he presents. The only reason that the math takes priority for most people is because common sense has lost its value within astrophysics as increasingly complex and unphysical phenomenon are postulated. People have become convinced that the mathematics is more physical than the images that we take of space, but they only get away with this because these things are fairly distant. As you get closer in time and space, the theories become more "normal" for the brain to handle. Astrophysicists can play in the playground of their choosing for the sole reason that our surroundings are not currently hostile, and haven't been for a while now. But, it's short-sighted to conclude that it will always be so. Humans are not proliferating because of the successes of our astrophysical theories of deep space. We are here simply because those forces in deep space have stayed in deep space. The mainstream theories postulate that it will largely stay this way, but alternative cosmologies that involve the electrical nature of plasmas make no such promises. It appears that we've opted for the cosmology that presents the least threat to ourselves. Do you believe that this is completely by chance?

      If we're observing that deep space is different from our immediate surroundings, then it would make sense to investigate why this might be so within the context of plasmas, which constitute virtually all of space's visible matter. What we observe with plasmas is that we have few of them here on Earth, and then once you get to the ionosphere, it's all plasmas nearly 100% of the time until you get to the next planet or asteroid. A reasonable person would realize that this is likely the point at which our own immediate physical reality becomes disjointed from the unusual things we observe in deep space. Sure, our local solar system also appears to follow standard fluid-like equations, but plasmas do not *have* to behave like that. They can become electrical within the laboratory, and no assumption regarding quasi-neutrality can ever negate that physical experimental fact, which we have observed within the laboratory and which we use in numerous consumer electronics.

      That more people do not realize this is rather surreal. But, there appears to be very little desire for real introspection when it comes to the mainstream theories. It appears more like a frenzy to get media coverage by one-upping the man before you. Common sense lacks the glamour.
      --
      "A man cannot begin to learn that which he thinks he already knows." --Epictetus, 1st Century A.D.
    11. Re:Only Problem Is ... by Lord+Ender · · Score: 1

      IANAAP, my point was just that anyone who has experienced vertigo or seen an optical illusion will know that you can't trust your brain to interpret visual data pertaining to things very large or small, very distant, or in some other way outside the range of experiences we encountered while evolving. I'm not saying our visual interpretation of such things is necessarily wrong, just that we shouldn't have a lot of confidence in it.

      In principle, I love challenges to fundamental scientific theories--if they fail they strengthen the old theories, if they succeed then we have advanced our knowledge. There is no way to lose!

      --
      A slashdotter who didn't build his own computer is like a Jedi who didn't build his own lightsaber.
    12. Re:Only Problem Is ... by pln2bz · · Score: 1

      IANAAP, my point was just that anyone who has experienced vertigo or seen an optical illusion will know that you can't trust your brain to interpret visual data pertaining to things very large or small, very distant, or in some other way outside the range of experiences we encountered while evolving. I'm not saying our visual interpretation of such things is necessarily wrong, just that we shouldn't have a lot of confidence in it.

      The problem occurs when tricks of the eye become a necessary theoretical mechanism for minimizing the impact of observations that are enigmatic to the popular theories. What you will oftentimes find, for instance, is that many claims of gravitational lensing are in fact attempts to explain away observations of high redshift objects and filaments near lower redshift objects. There is much eagerness to resort to such theories when the enigmatic objects pose a threat to the mainstream theories, but far less enthusiasm for ensuring that lensing is occurring for objects where it should also be occurring. See for yourself ...

      Astrophysical Evidence shows Profound Fundamental Principles of Mathematical Physics
      have been misapplied to Current Concepts of Gravitational Lensing

      http://www.extinctionshift.com/SignificantFindings.htm

      Also, many people do not realize that lensing requires an extraordinary amount of matter. Many times, normal baryonic matter only constitutes a small portion of this required matter. Non-baryonic matter thus becomes a fudge factor that fills in the required mass.

      These issues are important because in addition to considering that our eyes are being tricked by things like lensing, and in addition to considering that quasars are metaphysically bright objects at the edge of space, we should also consider that perhaps redshift is simply not always merely representative of distance. When images appear to demonstrate as much, we should never allow ourselves to completely rule the idea out (which is pretty much what is happening right now).
      --
      "A man cannot begin to learn that which he thinks he already knows." --Epictetus, 1st Century A.D.
    13. Re:Only Problem Is ... by Celestial+Avatar · · Score: 2, Informative
      There are so many things wrong with this post it is hard to know where to start... 1.) Quasars are found in both spiral and ellipical galaxies, so not all of them are "connected to or being ejected from spiral galaxies." 2.) The mainstream theories that you put down so quickly have been built upon research that took place in the 40 or so years since Arp made his claims. Since then astronomers have found (among other things) that the redshifts of the quasar host galaxies are completely consistant with the redshifts of the quasar. This means that quasars are not being ejected, as Arp (and you) claim. 3.) Please provide a direct link to the claim that "more recent statistics demonstrate that Arp is probably right."

      But the fact that there is any debate at all on it is rather silly. I agree with this statement. In the past four decades observations have provided overwhelming evidence that the redshifts of quasars are cosmological, not due to any type of velocity redshift due to ejection from a galaxy. Unfortunately, armchair astronomers continue to spread long discredited theories as the truth.

      People can observe the images that Arp discusses and decide for themselves whether or not he is right. The real question is whether or not you believe somebody's math over your own eyes. No, the real question is whether you believe the peer-reviewed work of thousands of Ph.D. wielding astronomers over the past four decades over your own eyes. Arp's theory was interesting at the time, it made predictions that could be tested, and it was found to be incorrect.
    14. Re:Only Problem Is ... by pln2bz · · Score: 1
      I'm unfortunately unable to find the paper. It's out there. I've written about it before in one of my prior Slashdot interactions.

      In the past four decades observations have provided overwhelming evidence that the redshifts of quasars are cosmological, not due to any type of velocity redshift due to ejection from a galaxy. Unfortunately, armchair astronomers continue to spread long discredited theories as the truth.

      It would probably be proper to place a bold asterisk next to "discredited". There remain strong arguments for many things in cosmology, astrophysics, archaeology, geology, meteorology, subatomic physics and solar physics, as well as the interpretation of ancient historical documents and stories. None of these alternative theories are being taken seriously enough to be properly discredited. In many cases, evidence is trending in the direction opposite of mainstream. I would point as a clear case in point the announcement this week that uranium isotopes are not invariant. If that finding had occurred 40 years ago, science might have gone a completely different direction.

      The problem of taking such a strong stance as your own in favor of the mainstream theories to the detriment of your own knowledge of heretical ideas is that you do not see that a common thread weaves its way through many of the most recent findings in seemingly unrelated disciplines. I recommend that you spread yourself out a little bit more in terms of reading material. You will start noticing things that you were previously oblivious to. Not everything popular, it turns out, is necessarily true. But you shouldn't have needed me to tell you that. Over time, it is inevitable that some ideas that are currently fringe will turn out to be correct. I don't think you even need to take a philosophy of science class to realize that. Just learning about a few instances of it in the past should be sufficient.

      For instance, it was strenuously believed for many years that electricity and magnetism were unrelated. The connection wasn't discovered for 20 years after compasses became commonplace because it was just "common sense" back then that the two were separate "fluids". I respect people who have a lot of technical information, but many times, these people fail to objectively educate themselves on the philosophical and historical details -- as if that context for their skills is unnecessary. Part of this education involves at least properly grasping what is being said by the heretics to a level such that you can make a qualitative judgment for yourself for each new observation in terms of *both* models. If you make no effort to do this, then you will certainly eventually be wrong because science sometimes takes unexpected turns.

      I can't be all that confused with respect to Arp because I'm at least aware that he's arguing that quasars possess *intrinsic* redshift. The extra redshift is not due to velocity from ejection, but rather exists as an apparent property of the matter itself. Arp proposes the explanation that redshift has an age component to it, which is one possible way to explain why the inherent redshift value (not the raw value, btw) appears to decrease in quantized fashion as the objects move away from the galaxies.

      The argument that 40 years of time somehow changes all of this is nonsense. His images of filamentary bridges do not expire.

      We should expect that mainstream astrophysicists will continue to develop their theories. All of the physical mechanisms necessary to explain away all of the enigmatic observations they've encountered over time are now sufficient to make the mainstream theories essentially unfalsifiable.

      Seeing unusual galactic rotation curves? That's dark matter.

      Got high redshift objects associated with low redshift objects? That's gravitational lensing.

      Not getting all of the galactic shadows necessary to demonstrate that the CMB is at the edge of space? That's dark energy.

      Artifacts within the

      --
      "A man cannot begin to learn that which he thinks he already knows." --Epictetus, 1st Century A.D.
  18. must... resist... by Anonymous Coward · · Score: 3, Funny

    "The goatse guy could not be reached for comment."

    1. Re:must... resist... by MarkRose · · Score: 1

      This is an article about black holes, not brown stars, silly!

      --
      Be relentless!
  19. OK, so someone found them by Skapare · · Score: 1

    Now I'd like to have them back, now, please.

    --
    now we need to go OSS in diesel cars
  20. Hawking Radiation? by Anonymous Coward · · Score: 0

    DISCLAIMER: All my current knowledge on the subject comes from a couple weeks of mild interest with NO physics or astronomy background almost a decade ago. And I have a horrible memory.

    I think it has something to do with Hawking Radiation, which eventually uses up all the matter-energy in the black hole, causing them to shrink and evaporate. This is why the bajillions of micro black holes (as in, on the quantum scale) that theoretically exist EVERYWHERE (there's probably an astronomical number in your brain right now, even) don't last for very long (fractions of fractions of fractions of a second), evaporating before they can suck up enough matter to grow big enough to be a problem. I don't know how long it would take for these large black holes to evaporate, though.

    1. Re:Hawking Radiation? by Joaz+Banbeck · · Score: 1

      ...bajillions of micro black holes (as in, on the quantum scale) that theoretically exist EVERYWHERE (there's probably an astronomical number in your brain right now, even) Wow, I'glad to hear that. I thought I had mad cow disease.
    2. Re:Hawking Radiation? by ls+-la · · Score: 1

      The rate of evaporation of a black hole is, counterintuitively, proportional to the inverse square of the mass. That means the larger a black hole is, the less power it emits. It would take billions of years for any decently sized black hole to evaporate. I plugged in the numbers for our Sun, and it would take ~10^67 years to evaporate. Then consider that the black holes are several orders of magnitude higher, and the evaporation time is proportional to the cube of the mass, and we're around 10^80 years for a supermassive black hole like this. Any black hole that we can detect, we will never see evaporate.

    3. Re:Hawking Radiation? by huckamania · · Score: 1

      Not from this side of it, at least.

  21. Suddenly by lukesky321 · · Score: 1

    black holes, hundreds of them

  22. It's just grit on the scanner scope... by Artega+VH · · Score: 5, Funny

    As covered by Red Dwarf...
    "Well, the thing about a Black Hole, its main distinguishing feature, is it's black! And the thing about space, the colour of space, yer basic space colour, is its Black! So how are you supposed to see them. ... We've been in space for three million years and there hasn't been one! Then, all of a sudden five of them turn up at once!"

    And the cause of all these black holes?
    "Five specs of grit on the scanner scope....the thing is about Grit... is it's black.."

    --
    groklaw, wired and slashdot. The holy trinity of work based time wasting.
    1. Re:It's just grit on the scanner scope... by ledow · · Score: 3, Funny

      Swirly thing alert!

  23. First one named "American Culture" by jihadist · · Score: 0, Troll

    Proposed names for black holes:

    1. American culture
    2. Human environmental conscience
    3. Good TV
    4. Disco Comeback
    5. Emo
    6. Proof of Jesus
    7. D.A.R.E.

    Giant failures, humanity!

    1. Re:First one named "American Culture" by Anonymous Coward · · Score: 0

      6. Proof of Jesus

      There are many references to a man whose name translated to English as Jesus. I think he is also referred to as Yahweh (in Hebrew, I believe) or something like that. These references speak of a man born approx 2000 years ago, give or take a few decades.

      Currently, you could also go to many cities around the world and find a few individuals with the name of Jesus.

      Now, if you are speaking of Proof of God, then that is an entirely different situation. But you would also have to define what God is. Is he a Creator? The Programmer? The Father? His Noodly Appendage? Without more of a definition your statement is nothing.

    2. Re:First one named "American Culture" by Dragonslicer · · Score: 1

      I think he is also referred to as Yahweh (in Hebrew, I believe) or something like that. No, Yahweh is a poor attempt at transliterating the Hebrew (Y-H-V-H), which is the name of God that is pretty much never pronounced in Judaism (the name Adonai, which literally translates as "my lord" is used instead). The name Jehovah is a somewhat better transliteration. Personally, I would guess that the name Jesus is a Latinized version of the Hebrew name Jesse, though I've heard that most actual experts say that it comes from the Hebrew name Joshua.
  24. Comment removed by account_deleted · · Score: 2, Interesting

    Comment removed based on user account deletion

  25. WTF? by Anonymous Coward · · Score: 0

    Why the fuck is this +5 funny. Fucking mods.

    1. Re:WTF? by Fluffy_Kitten · · Score: 0

      Because racism is funny.

      --
      People who have no sig are cool
    2. Re:WTF? by UncleTogie · · Score: 1

      Because racism is funny.

      Sure, razzing people because of imaginary differences is funny.

      :P Tphtphtph. :P

      There's only ONE race: the Human one. Let us know when you're ready to join.

      --
      Don't tell me to get a life. I'm a gamer; I have LOTS of lives!
    3. Re:WTF? by Anonymous Coward · · Score: 0

      Sure, razzing people because of imaginary differences is funny.

      Nobody does that. Or can you really not see a difference between a big-lipped, wide-nosed, nappy-headed, brown-skinned African and your average German?

      The recorded difference in intelligence (one way) and athleticism (the other way) between the two populations is imaginary, too?

      How about the proven difference in criminality? Or is the disproportionate number of crimes committed by certain groups just supposed to be written off as coincidence?

      Is everything nurture, IYO? Heredity contributes nothing at all to the makeup of a person?
    4. Re:WTF? by JCSoRocks · · Score: 1

      "I've always wanted to say this, 'fo shizzle'."

      What're you talking about? Haven't you ever seen Dave Chappelle or Carlos Mencia or any other comedian that points out racial differences? While I believe that being racist is wrong, I don't think there's anything wrong with racial comedy. Saying that we're all identical is blindly denying the obvious truth that we're not.

      --
      You are using English. Please learn the difference between loose and lose; they're, there, and their; your and you're.
    5. Re:WTF? by UncleTogie · · Score: 1

      Haven't you ever seen Dave Chappelle or Carlos Mencia or any other comedian that points out racial differences?

      You mean the standard racial sterotypes? Sure, anyone can spout the lists off. Mencia even went out on the street and asked people of all races to describe other races. Sure, the result was typical...

      ...and inaccurate. My sister's adopted. Amer-asian, as she says. Do the stereotypes fit her? Does she speak with an accent? Does she fit the descriptions Mencia and/or Chapelle's routines?

      You can look at someone and think "Chinese people", "Mexican people", "Indian people", sure... But doing so will make you look at 'em as a "people" first, and a "person" secondarily. THAT is my gripe. Stereotypes can apply to a people... but people are applying them to individuals...with often-painful results.

      --
      Don't tell me to get a life. I'm a gamer; I have LOTS of lives!
    6. Re:WTF? by LeadSongDog · · Score: 1

      Because racism is funny. Yeah, all those funny looking cars going around in circles burning fossil fuel. Hilarious.
      --
      Oh, I'm sorry sir, I thought you were referring to me, Mr. Wensleydale.
  26. Bushy by madbawa · · Score: 1

    a doughnut-shaped cloud of gas and dust that surrounds and feeds a budding supermassive black hole. Is it just me, or does Dubya come to everyone's mind?
  27. Enter either Theory or Religion by Roger+Wilcox · · Score: 1

    These are the qustions that no one can answer, so they just make things up. Some of these people are scientists, others are crackpots. Some are a bit of both. Either way, there is no single, satisfying solution.

    What created the precursor to the precursor of the precursor? And the precursor to that? It's almost a silly question because you can quickly see that the line of questioning will never be resolved.

    Perhaps they spontaneously appeared. Or, as a facet of their infinite nature, they aways existed. Or, they were tears cried by God at the time of Creation. Pick the explanation you like, and it can be true for you.

  28. I've got a black hole in my pocket by mcmonkey · · Score: 1

    Well, half a black hole.

  29. RE: Hundreds of Black Holes Found by DavidD_CA · · Score: 2, Funny

    Oh good! I was worried I'd never see them again. The cleaning lady left my garage door open and they sneaked out.

    My quazars will be so happy to have them back home.

    --
    -David
  30. I wonder... by ILuvRamen · · Score: 1

    They say these are some of the first but I have another theory. They aren't and there are older ones, but we can't see them. Does anyone else think that maybe there are galaxies so old and fairly small (as in dense) that their supermassive black hole had enough time to literally sucked the entire thing in and now there's no more matter outside it so it's completely invisible to us? Cuz we can only really see black holes by seeing the stuff that's emitted from matter around it that's being sucked in.

    --
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  31. Re:Hundreds of black holes found by Anonymous Coward · · Score: 0

    ha ha
    racists are stupid

  32. Slashdot's moderation system: censored? by Anonymous Coward · · Score: 0

    At least one person moderated this racist post "Funny," along with a few others, then those moderations disappeared into the Memory Hole.

    This sort of moderation-redaction isn't explained on the Slashdot FAQ; someone fill me in? I'd hate to participate in a system that deletes unpopular speech.

    - Poster With A Two-Digit ID.

    1. Re:Slashdot's moderation system: censored? by Anonymous Coward · · Score: 2, Interesting

      There are a couple of ways to get mods effectively removed without a coverup.

      If I moderate something and then realise its a bit fucked I normally post in the discussion somewhere (even as AC but still from my account)
      It removes the moderation.

      If one person mods a comment as funny and 10 mod it as troll then the funny percentage drops off and is not listed anymore.
      This I am not totally sure about for simple (funny/troll) mod decisions, I know it happens when a post is moderated wildly by different elements(funny,interesting,informative,troll,flamebait) before one mod class wins (slash lists only the top 3 mod kinds I think).

      Then again, you might be right and it might be a conspiracy.

    2. Re:Slashdot's moderation system: censored? by Anonymous Coward · · Score: 0

      What is racist about the post? As far as I can see, it's a play on words between "hole" and "hoe".

      Would it be a racist post if it was white holes / hoes?

    3. Re:Slashdot's moderation system: censored? by Asztal_ · · Score: 1

      Probably metamoderation. At least, I think they still have that. I can't find it, but I'm low bandwidth mode.

  33. Those are MY damn black hoes! by Anonymous Coward · · Score: 0

    For decades, a large population of active black holes has been considered missing.

    Hundreds of active black hoes? Their mine hoes, been lookin for them everywear, man? You bring them hoes back to me, dont you TOUCH those hoes aight? You bring em back I let you sample em if you want, cause Im a great fella.

    I was scared I might have run into one in a dark alley one night, thank goodness they have been found.

    What you scared about man, their CLEAN black hoes, check em hoes every month, unposible. Those black hoes been with the whole neighborhood and they done nothing to no one.

    And what's with that news there:

    spent their youths building monstrous black holes at their cores

    Yea I spent my youth growing them hoes, but monstrous? You know nothing man, it's exactly big hoes what you want, I garantee it.

  34. Red spectrum by wylderide · · Score: 1

    What does the red spectrum tell us about quasars?

    --
    This is the best restaurant I ever eat in
    1. Re:Red spectrum by aadvancedGIR · · Score: 1

      It tells us that they are going away from us very fast, which, because of the universe expansion, means that the ones we can are very far away, or in other word, ancient.
      All the quasars we can see are mostly the same age (around 9 billion years old if I remember well), which means they formed in a particular set of conditions and then either disapeared or changed into something else (most likely galaxies).

    2. Re:Red spectrum by DiscoDave_25 · · Score: 2, Funny

      What is a spectrum, what is a red one, why is it red, and why is it so frequently linked with quasars?

      What the hell is a quasar?

      (write bigger)

  35. Okay, take it easy folks by jigyasubalak · · Score: 1

    It's only that someone just came back from a nudist colony.

    --
    The best planning can be done after the project completes.
  36. Re:Hundreds of black holes found by Anonymous Coward · · Score: 2, Insightful

    Racists, like conspiracy theorists, realize the truth of the world even though it runs contrary to dominant, irrational memes propagated by the opinion-makers of media.

    There are plenty of racists with PhDs, including Harvard professors... the fact that moderators at a pop-culture geek site give a kneejerk negative response to any racialist post doesn't make it "stupid".

    As with anything, really, the more popular the idea, the stupider it is -- so it is with the P.C. notion of ultimate equality and myopia with regard to hereditary intelligence and behavior.

  37. is this a mac os x joke? by Anonymous Coward · · Score: 0

    the space and everything
    the timing is so perfect

    m10

  38. Those aren't black holes... by JK_the_Slacker · · Score: 2, Funny

    ...they're honeypots powerful enough to bog down the Storm botnet!

    --
    I'm waiting for a "-1 somepeoplejustshouldn'tgetmodprivileges" meta-moderation.
  39. Re:Huh? by Anonymous Coward · · Score: 0

    Theory implies a set of truths, following from some axioms. Some truths are confirmed by empirical result that seems to match the phenomenon predicted by the theory, thus attaching evidence of correctness to a mathematical model. What is hard to understand? In modern physics, mathematical necessity sometimes precedes modelling. Physics is no longer a process of observation-first-explanation-later. Discovery now begins in the equations, in many cases.

  40. argh! by sentientbrendan · · Score: 4, Informative

    "This is pretty big, as it's empirical evidence proving the existence of objects that theoretically had to exist but could not be detected previously."

    look closely

    "empirical evidence proving"

    should never occur in any sentence ever. By definition empirical evidence cannot prove anything. Empirical evidence lends support to inductive arguments, which don't concern themselves with proof. Only analytic statements may be proven.

    Please, for the love of god remember, there are two forms of logic, inductive which has arguments from experience (physics), and deductive which has arguments from pure reason (mathematics). Only deductive arguments can be proven because you can always argue with the strength of the evidence in inductive claims. It is a fact (supported by inductive evidence and deductive proofs) that inductive claims may be false no matter how strong the evidence for them is. Thus they can never be proven, but you can say "there are strong practical reasons to believe."

    People getting basic logic wrong has led to a lot of poor decisions in our society lately, so please do not contribute to the problem by adding to confusion over terms.

    1. Re:argh! by Have+Brain+Will+Rent · · Score: 1

      Well if you are going to get all that nit picky then you shouldn't make statements that are self contradictory, such as: look closely "empirical evidence proving" should never occur in any sentence ever.

      --
      The tyrant will always find a pretext for his tyranny - Aesop
    2. Re:argh! by AgentBif · · Score: 1

      Only deductive arguments can be proven because you can always argue with the strength of the evidence in inductive claims.

      Spectacular comment, thank you for making it. Too often politicians, pundits, PR spin artists, and various other emotional inflammatories run around borrowing the language of logic to try to make themselves sound credible, when in fact they end up just making themselves look foolish and undereducated. We have a serious lack of critical thinking skills among the general public and many are too easily swayed by such vague and specious arguments masquerading as authoritative fact.

      Of course the problem is several orders of magnitude worse in the third world.

      A way to fight this is to declare a war on ignorance... Bludgeon the world with an education budget that is of the order of current military spending. There's a jihad worth living for.

      Ok, so now I'm being emotionally inflammatory.... but in a good way.

      We are not robin hood, prince of thieves. We are petty criminals taking what want because no one can stop us.

      Criminals?

      Petty?

      Taking what we want?!

      WE?!

      Hmm. Cute but devoid of substance. I hereby take issue with the inductive claims in your sig! But then, check out MY sig:

      --
      Privacy Statement: We value your privacy! It is very valuable. That's why we try to sell it whenever we can.
  41. Re:Hundreds of black holes found by Anonymous Coward · · Score: 0

    ha ha
    racists are hate-mongering assholes

  42. Re:Hundreds of black holes found by Anonymous Coward · · Score: 0

    Is that really wrong, though?

    Every civilization was founded by hate-mongering assholes. It's really the root of humanity. Denying that is denying reality.

  43. Re:Huh? by rts008 · · Score: 1

    Obligatory Cheech and Chong: Up in Smoke paraphrase (regarding the proposed new band uniforms)

    "So, it's DIFFERENT, but the SAME?!?!?" That's cool!

    --
    Down With Slashdot BETA!!! I've been around the corner and seen the oliphant; you can only abuse me from your perspecti
  44. The truth hurts by speaker+of+the+truth · · Score: 0, Troll

    Its sad to see someone who tells the truth modded as a troll.

    --
    Using openSUSE instead of Windows since 9th of October, 2007 and liking it.
  45. God squad should be happy by flyingfsck · · Score: 3, Funny

    The universe is now proven to be holier than thou.

    --
    Excuse me, but please get off my Pennisetum Clandestinum, eh!
  46. Uh.... by Jane+Q.+Public · · Score: 2, Funny

    No, you are referring to brown holes. They are not the same things.

  47. Also not to be pedantic... by Jane+Q.+Public · · Score: 1

    I am sure some people will think I am nitpicking, but I am not. I just like to see a bit of precision about the topic of discussion.

    Quote: "This is pretty big, as it's empirical evidence proving the existence of objects..."

    It is nothing of the sort. It is empirical evidence OF the existence of certain objects. It proves absolutely nothing.

  48. I knew it by EEPROMS · · Score: 0, Troll

    OH!, MY GOD! its full off assholes.

  49. Re:Hundreds of black holes found by Anonymous Coward · · Score: 0

    So don't deny it; just move on. All hospitable land on this planet has been colonized and near-instant communication is possible with a great portion of it. What's the point of trying to divide the world when everyone's next door?

  50. Well.... by w1relessm0nkey · · Score: 2, Funny

    Finding Black Holes is an intense job, it's not hard to get Sucked in, and there are always new Events on the Horizon. // Sucky job but somebody's got to do it?? /// Having seen "Event Horizon" I don't think I'd really want to go looking for black holes....ugh.

  51. Experimental not empirical by Anonymous Coward · · Score: 0
    I agree in principle but you are missing the point. Deductive logic can result in proofs, but it cannot prove anything useful (as Arthur Eddington observed, reliance on deductive logic alone would reduce all of physics to a tautology.) As a simple example, Euclid's apparently deductive logic is nothing of the sort because it assumes the existence and nature of the things it describes. A demonstration that spacetime is curved immediately invalidates Euclidean geometry, even though it is a good enough approximation at small scales.



    The fact is that empirical (i.e discovered by investigation) evidence can easily prove things. This is because it can falsify, but every falsification of a negative statement can be reversed into a non-universal affirmation. If I deny the existence of a postulated entity called a black hole, and empirical study turns up a black hole, my denial is falsified and the positive (the existence of black holes) is confirmed.

    You are confusing experimental evidence about the specific with inductive logic about the general. If I find a black hole at the centre of galaxies A,B,C....N where A..N is my current list of observable galaxies, I have proven that some galaxies have black holes at the core, but not that all do. A single new galaxy without a black hole would disprove any universal statement, but would have no effect on the statement that _some_ galaxies have black holes.

    It's true that a very common logic error by the ignorant is to promote the observational to the universal, but that's unfortunately an aspect of how our brains seem to work.

  52. Answer by anandsr · · Score: 1

    The reasoning goes like this.
    1) The universe cools down and a vast amount of protons and electrons are generated.
    2) These combine to form hydrogen.
    3) The universe is still very small but expanding very rapidly.
    4) The uncertainty principle makes sure that there are some pockets with very high density (comparatively speaking).
    5) Some high density regions develop enough gravity to pull in lots of other hydrogen.
    6) Everything does not fall straight it goes in circles like planets don't fall directly towards the sun.
    7) The hydrogen clouds are so huge that they contain enough matter to create galaxies.
    8) The cloud revolves around its center falling inward.
    9) The center does not glow like the sun because of the immense amount of matter. It actually reaches the black hole stage with a very negligible star phase.
    10) This is the super-massive black hole at the galactic center. Lighter matter then spreads out because of interactions with heavier matter falling in. The heavier matter eventually becomes a part of the black hole at the center.
    11) Normally it becomes a nearly circular disk.

    The only weird thing (for me) is that it does not start out as a sphere but as a strip (I believe not a thin strip).

    Disclaimer: IANAAP.

  53. ...in Blackburn, Lancashire by fellip_nectar · · Score: 1

    Now they know how many black holes it takes to fill the Albert Hall.

    --
    Worst. Signature. Ever.
  54. Not *quite* totally black... by TiggertheMad · · Score: 1

    Cuz we can only really see black holes by seeing the stuff that's emitted from matter around it that's being sucked in.

    An interesting thought, but black holes dialate space time around them. This causes what is called gravational lensing. The super massive gravity of the black hole actuall bends light of stars behind it in space. There have been black holes that have been discovered because astronomers have noticed the effects of gravational lensing.

    Also, if matter is being sucked in from an accretion disk, it is highly unlikely that it will all fall into the hole. Pretty much any black hole is going to rotate, and most will rotate VERY fast, since when a star collapses conservation of momentum will cause it to accelerate its rotation as it shrinks. Any particles near the black hole will be pulled around it as it rotates, and some mass will end up in orbit around the hole. Quasars give off tremendous ammounts of energy as this mass is superheated from friction. Any black hole that has an accretion disk (a.k.a. a quasar)is going to be pretty 'bright', and I would guess that it will stay 'bright' for a very long time after it runs out of mass to actually draw in.

    Not to say that your idea doesn't hold water, but there are ways of detecting black holes that aren't absorbing large ammounts of additional mass. Nothing rules out what you suggest though. Just remember, black holes don't really 'suck things in', as science fiction suggests. If our sun became a black hole this very second, everything would keep orbiting exactly as it does now. The only things that would be sucked in would be a few comets that were on a collision course with the sun's gravational pull anyway.

    --

    HA! I just wasted some of your bandwidth with a frivolous sig!
  55. I can hear those BH's saying... by Anonymous Coward · · Score: 0

    Mmmmh... Donuts!

  56. Goatse guy... by larjon · · Score: 1

    Goatse guy, is that you...?

    --
    $> cd /pub
    $> more beer
  57. My theory about black holes ... by ThirdPrize · · Score: 1

    goes like this. No one knows what happens to matter when it enters a black hole, only that it can't get out again. Secondly, no one knows where the matter for the big bang came from, i mean a whole universe out of nothing.

    Couldn't a black hole be a hole in our universe that matter drains out of? Then that matter passes into another dimension to make up someone elses universe. So black holes and big bangs are just two sides of the same hole. Once enough matter (and black holes) have come through, the expansion stops and thanks to the black holes this new universe starts flowing away. Think lava lamp but without bits drifting off.

    Impossible to prove but I like its symmetry.

    --
    I have excellent Karma and I am not afraid to Troll it.
  58. Finally, we have an answer! by Ira+Sponsible · · Score: 1

    Scientists have calculated that there should be about 80% more mass in the universe than they're able to account for and have proposed a number of radical theories to resolve the discrepancy such as the existence of dark matter or the influence of parallel universes. The problem was finally solved when Chuck Norris admitted he kicked a hole in the universe and that's where all the missing matter went.

    --
    1.Netcraft confirms:In Soviet Russia all your base welcomes a beowolf cluster of CowboyNeal overlords. 2.? 3.Profit!!1!
  59. Apologies to Gilbert and Sullivan by Anonymous Coward · · Score: 0

    I am the very model of a Singularitarian
    I know of Hawking Radiation though it's rather scary an'
    I've read the fella's books about black holes and time's brief history
    The Chandrasekhar Limit is a source of no great mystery
    Naked singularities are rather well-prohibited
    By principles of cosmic censorship existence-limited
    I know of relativity and matters cosmological
    And wash my socks in soapy suds both flash and biological

    And wash my socks in soapy suds both flash and biological
    And wash my socks in soapy suds both flash and biological
    And wash my socks in soapy suds both flash and biologicogical

    In fact I'm rather well-informed on matters wide and varied an'
    I am the very model of a Singularitarian

  60. "direct"? by mapkinase · · Score: 1

    "Direct" evidence? The article points to the relationship to the quasars (are they considered "directly" related now? I missed that point) and then continues on quasars as if it is the same thing...

    --
    I do not believe in karma. "Funny"=-6. Do good and forbid evil. Yours, Oft-Offtopic Flamebaiting Troll.
  61. Economies of scale, anyone? by martin-boundary · · Score: 1
    Great Cosmic Industrialist: "You can have any coloured hole you like, as long as it's black."

    God: "Oh. Allright."

  62. Re:What does the red spectrum tell us about quasar by Archangel_Azazel · · Score: 1

    I miss Red Dwarf :-)

    A.A

    --
    Your mind is like a parachute. It works best when it's been opened.
  63. Too bad... by Anonymous Coward · · Score: 0

    Makes that trip to see God a bit trickier.

  64. Damn teenagers by Dekortage · · Score: 1

    FTA: "...most, if not all, massive galaxies in the distant universe spent their youths building monstrous black holes at their cores."

    That's exactly the problem with galaxies these days. They sit around all day, killing their brain cells on violent video games, unhealthy food, and astronomical porn (and listen, Vega doesn't look as good in a bikini as she used to). And what happens? Black holes at their cores. Big frickin' black holes at their cores. No morals, no ethics, not a clue about how to be nice to your galactic neighbors. When I was a young galaxy (and a rather handsome one too), that didn't happen. We helped old stars carry their groceries across the street, picked up the trash left by those damn comets, and had big parties when new stars were born. About the most reckless thing we did was a joyride through a nebula or two.

    Dang kids. Get off my lawn!

    --
    $nice = $webHosting + $domainNames + $sslCerts
  65. Think the Earth and the Moon by Moraelin · · Score: 4, Informative

    Well, the Earth is pulling the moon towards it too, and yet we still have a moon after all these billions of years. The Sun is pulling the Earth towards it, but, funnily enough, after all these billions of years we're not quite there yet.

    In a sense, the Hitchhiker's guide got that right: ""There is an art to flying, or rather a knack. It knack lies in learning to throw yourself at the ground and miss. Clearly, it is this second part, the missing, that provides the difficulties."" We keep falling in an almost circular orbit around the Sun and ending up (almost) where we started.

    What I'm trying to say is that those super-massive black holes obviously do suck everything towards them. But the rest of the galaxy sees it as centripetal force and rotates around them.

    The problems with a black holes are at closer ranges.

    For a start, if you do get closer to it than its event horizon, then you're properly fucked. There is no way to get out of there, not even theoretically. Not even light can get out of there. Hence, the name black hole.

    However, I'll return to the analogy with the solar system. With the Sun's massive gravity well, it's damn near impossible to hit it, even if you wanted to. If you dropped a big rock right at it, even the slighest deviation or initial speed sideways (like would happen if you dropped it from Earth), would cause a clean miss and you'd just get that rock in some kind of orbit around it. The only way to actually hit the sun would be if that orbit was flattened enough that it passes through the sun.

    And the same problem applies to black holes too. Remember that it's a more massive gravity well _and_ the "bullseye" is much smaller, at least in relation to the gravity well. As you fall even a little off the centre, your speed would increase enough so at one point the centrifugal force (yes, I know it doesn't even exist, but it makes the explanation easier) just flings you clean around it.

    There's even at least one theory that nothing ever finishes falling into a black star. Although there is energy loss due to that X-ray emission and all, basically matter just spirals closer and closer to the event horizon without ever reaching it. Think an asymptotic decay. It gets closer and closer and closer over time, but never quite reaches it.

    The second problem is, well, tides. If you get close enough to the centre of a gravity well, say, looking at the centre, then your front is pulled towards it much stronger than your back is.

    This is actually true for any gravity well, and, again, you can see it in action in the solar system too. That's why the moon is tidal-locked with the Earth and you always see the same face of it.

    But for a massive enough gravity well, the force difference gets larger and can rip a star or a planet apart. That's how stars and black holes end up occasionally peeling another star apart, pretty much syphoning its outer layers.

    So basically you could be past the event horizon and still be properly fucked, in slightly different way.

    But even that only extends so far. IIRC there are stars orbitting the centre of a galaxy with a period measured in hours. Admittedly, that's not as close as it might suggest, again because of the massive gravity. Even with that angular speed, you still need a heck of a radius to stay in orbit there. But, still, if those survive just fine, then you can probably see how the rest of the galaxy is safe.

    --
    A polar bear is a cartesian bear after a coordinate transform.
  66. It is... by ed.mps · · Score: 1

    Science, and works. Can anyone explain now consequences of this discovery? Or it, by now, is restricted "just" to be "the first direct evidence that most, if not all, massive galaxies in the distant universe spent their youths building monstrous black holes at their cores."

    --
    !sig
  67. Where are the Black Holes Now? by prof_bart · · Score: 2, Insightful
    The point is that we know where they are now: at the centre of every Galaxy. We believe this based, among other things, on studies of the orbits of stars near the centres of galaxies - if you know the orbit, you can calculate the mass that is being orbited. Our galaxy has a compact object (ie, a Black Hole) about 100,000 times the mass of the sun in its centre.

    The question was: when did they form?

    If a Black Hole is in a region with lots of material...it grows. Here's (roughly) how: most of material will orbit the black hole so the Black hole won't grow. BUT: if the density is high enough, it will form an orbiting disk of material. The particles in the disk will collide with each other in their mad dash around the black hole, heating the disk up, and knocking some of the material out of orbit, into the black hole. So you end up with the black hole growing, and an extremely hot disk shining X-rays across the Universe. This has been seen in more nearby quasars. Here they have found the X-rays from the more distant hot disks.

    This discovery should be classified as excellend confirmation of what most astronomers thought must be true.

  68. in the end what happens? by Anonymous Coward · · Score: 0

    In the end of the poor life of a black hole, what happens?

    Any ways, time will tell if what they have found are black holes or not. If they are there should be some sort of change to them over a period of time and thus we should see that change. This might take longer then we would like but there should be a change.

  69. Tragic Mis-Acronymization by Xerxes314 · · Score: 1

    Aside from being a cool observation, I think the most important aspect of this story was that the astronomers failed to realize the potentially great acronym here. The Great Observatories Origins Deep Survey (GOODS) is good, but would it not be better to be just the Great Observatories Deep Survey?

    No sinful star-eating black hole can cloak itself in dusty bands to hide from the all-seeing eye of GODS!

  70. Finding them is easy by Anonymous Coward · · Score: 0

    Just go to the east side of town where they sell drugs. You'll not only find black ones, but white ones too.

    Oh, HOLES, I thought you said HOs. Sorry, my bad. I was wondering WTF a nerd site was doing talking about... never mind.

  71. Re:Huh? by corgan517 · · Score: 1, Funny

    * Empirical evidence proves the existence of objects that theoretically had to exist
    * An object theoretically had to exist,
    * Therefore, this object may or may not have existed.
    * This evidence proves an object may or may not have existed.
    * The evidence proves nothings?
    * Confirmation bias?
    * Profit! (?)
  72. ...since the beginning? by dtjohnson · · Score: 1

    "Hundreds of black holes that were thought to exist at the beginning of the universe..."


    How can there be a 'beginning of the universe?' That would also imply that there is/was an end and what would there be after the end or between the end of the last universe and the beginning of ours?

    1. Re:...since the beginning? by mshurpik · · Score: 1

      How would you feel if aluminum really did burn more easily than wood?

      I think you are facing that crisis right now.

  73. i used to think they dust bunnies under my bed by peter303 · · Score: 1

    Until one gobbled up my vacuum cleaner into microscopic invisibilty last week. Glad I let go quickly.

  74. DAMMIT - NO SUCH THING by burtosis · · Score: 1
    Seriously the media and artists never talk to those sciency types. There is no such thing as 'Black Hole' as on this offender of child hood learning http://en.wikipedia.org/wiki/The_Black_Hole.

    Straight space as observed by human eyes and interpreted by human brains is defined by movement along a light ray path. It is obvious because if you are looking directly at an object as it appears that is where the photons come from.

    Light bends severely near the event horizion making it an invisibility cloak even better than this one: http://science.howstuffworks.com/invisibility-cloak.htm because instead of mimicking the light it actually bends space to redirect the light itself. Sweet...

    There is a point at which any object directly behind the black hole makes a ring due to space being bent like a lens so that the rays converge and fall on a single point. However lensing by a black hole, even up close, will resemble this http://www-ra.phys.utas.edu.au/~jlovell/simlens/lens_large.gif

  75. What a sad world we live in...... by ImpShial · · Score: 1
    You know, I've been a /. reader for awhile now, and I usually keep my threshold around 3. I enjoy RTFAs, browsing the comments and usually getting a kick out of the more intelligent and knowledgable posts.

    Recently, though, I realized I was clicking on n reply beneath your current threshold. a little too often to see where certain threads took me. I started reading at a threshold of -1 to ease up on the mouse-clicks, and found that there were some deeply nested comments that should have higher mod-points.

    I felt satisfied with my decision and now browse at -1 consistantly.

    Until today, /. was an escape for me at work where I could read posts from "enlightened" posters. I was looking forward to technobabble revolving around blackhole theory.

    What I got was A LOT of mean-spirited rascist comments. And I mean A LOT. Browse at -1 if you don't believe me and read some of these.

    I know /. is filled with people of differing views and opinions such as evolution vs. creationism vs. intelligent design (which are some of my favorite /. debates), Democrats vs. Republicans vs. Independants, Specialists vs. laymen etc. I enjoy the civilized debates and even the heated arguments.

    But the level of ignorance I witnessed today was appalling. I know some of it was meant to be humorous and not hurtful, but even humorous racist posts feed the ignorant "Anonymous" posters and give them validation.

    Racism is one of the worst socail problems we have on this planet, right up there with religious differneces. It's disgusting, and I'm ashamed to be a part of /. today.

    But I'm not leaving. If everyone that was sickened by comments such as these left, there wouldn't be anyone worth reading left. So I'm putting up with it today, and hoping to see less of it in the future.

    --
    I gave up religion for Lent.
    1. Re:What a sad world we live in...... by lgw · · Score: 1

      Yep, this is why there's a moderation system. Folks are free to post whatever they want and get moderated to oblivion. -1 exists for a reason!

      --
      Socialism: a lie told by totalitarians and believed by fools.
    2. Re:What a sad world we live in...... by Anonymous Coward · · Score: 0

      Until today, /. was an escape for me at work where I could read posts from "enlightened" posters. I was looking forward to technobabble revolving around blackhole theory. What I got was A LOT of mean-spirited rascist comments. And I mean A LOT. Browse at -1 if you don't believe me and read some of these.

      And any emotional upset you experienced from this was voluntary on your part. All around the world someone, somewhere is doing something of some kind that would truly piss you off. For as long as this is true (with six billion people on the planet, I would venture that it's almost always true), you should be angry and upset all the time. If not, why are you so arbitrary regarding which one gets under your skin and upsets you? Can't you see how petty that is? Also, a joking statement can look just like a seriously mean-spirited statement unless you know the true intent of the author, which would be quite the claim to make considering this is slashdot. But the content isn't to your liking so you judge the author and feel free to assume at will.

      What I got was A LOT of mean-spirited rascist comments. And I mean A LOT. Browse at -1 if you don't believe me and read some of these.

      ...

      But the level of ignorance I witnessed today was appalling. I know some of it was meant to be humorous and not hurtful, but even humorous racist posts feed the ignorant "Anonymous" posters and give them validation.

      You don't appear to know fuck-all about "mean-spirited". Denying someone a job because of race alone is mean-spirited. If some idiot attacks another person because of race alone, that's mean-spirited. If someone would never imagine doing anything like that (your assumption that this isn't true does not constitute proof), has gotten over the insecurity surrounding race (which boils down to a political divide-and-conquer stragety) and finds racial humor amusing, you think that's mean-spirited because it speaks to some kind of weakness in you. Really it's your own ignorance that allows your emotional state to be at the mercy of the things other people say (thus you don't truly live your own life), and your own problem if you get upset by what you didn't have to seek out and listen to. You're too busy condeming what they are doing to see yourself playing the victim when there's a choice in the matter, but fuck it at least you get to bitch about something and feel noble, right? Amazing how all that nobility and getting offended and "righteous anger" doesn't make you feel joyous and fulfilled ...

      Self-righteous types like you are why there is a need for specific laws to guarantee some level of freedom of speech, since there are very few people who sincerely reject the idea but many who consider their pet crusade to eradicate this-or-that more important. "The road to hell is paved with good intentions" as they say.

      And no, I'm not expecting you to reply to this post, but I can be quite sure that you read it.
  76. Black Holes don't suck. by AgentBif · · Score: 1

    Black holes emit the same gravity that everything else does. They don't suck stuff down any better than any other clump of matter such as regular stars. So anything orbiting a black hole (like the rest of the galaxy) will just keep orbiting it pretty much forever... Just like the planets in our solar system will keep orbiting the sun pretty much forever.

    Take the Earth as an example. The Earth is flying along at about 30 kilometers per second. The sun is tugging on the Earth constantly and causes the Earth to fall toward it. But because the Earth has velocity, it keeps flying off in a tangent and keeps _missing_ the Sun. That's an orbit... a balance between the central mass' gravitational force and the orbiting object's velocity. Stable orbits just continue forever until something alters the kinetic energy of the satellite.

    If you want the Earth to actually "fall" into the Sun, you need to de-orbit the Earth. That means you need to put a huge rocket on the Earth that decelerates it by 30 kilometers per second... exactly the amount of speed at which it is flying around the Sun. This would be really hard to do. (If you look at the Saturn V rocket and see how much fuel it took to get that little pointy tip to the moon, you can imaging that doing this for the Earth would be, well, unimaginable.)

    It is actually really hard to make things stop orbiting their central mass and subsequently fall into it. Usually you need something that causes drag, a decelerating force, to make that happen. In most cases there isn't much around to provide such a decelerating force.

    --
    Privacy Statement: We value your privacy! It is very valuable. That's why we try to sell it whenever we can.
  77. Re:What does the red spectrum tell us about quasar by Anonymous Coward · · Score: 0

    Back in the day, we used to watch "Red Dwarf" on a 27 inch Motorola Quasar...

  78. lots mof em by Anonymous Coward · · Score: 0

    i found too lots of black holes in my backyard... may be the mole that i saw the other day has something to say about it...
    a cosmic mole!!!

  79. Ah, a crackpot... how cute by Moraelin · · Score: 1

    Looking through some of your other comments, you really like playing the crusader of poor oppressed heretical theories, don't you? But that's not the important part.

    The _real_ mark of the crackpot is believing such bullshit as that there's some high priests with some immutable dogma, quashing poor heretic visionaries like Mr Arp.

    The truth is that nothing is that stationary or frozen in conjecture. Especially not in astrophysics. The domain has evolved a _lot_ in the last, say, half a century, and stuff that was heresy once is the mainstream consensus now.

    E.g., dark matter would have gotten one laughed out the door some decades ago, now it's exactly the mainstream consensus that you rant and rave against. Dark energy actually came even later.

    E.g., space expansion itself was far from being set in stone in the 60's, when Arp published his claim. Heck, we didn't even have an estimate for Hubble's constant until 1958, and it would be another couple of decades until there was a consensus on it. Do you even understand what that means? It wasn't even a law or a theory yet, because noone had measured a falsifiable value to put on those equations.

    Also, it helps to remember that he's not exactly a nobody that you can handwave away, contrary to whatever mis-understanding you seem to operate on. He's well know, he's got a Ph.D. in the domain (so it's not as easy to hand-wave him away as the normal crackpots), he's got an atlas of galaxies that's still used as a reference, and many galaxies are still referenced by their Arp number. He's not easy to ignore. He stands out like a sore thumb. There have been a _lot_ of people who've studied his claims.

    Basically the last point alone should already tell you how bogus your conspiracy theory is. The idea that millions of people worldwide have somehow all decided to support red-shift in spite of all proof to the contrary, all just toed the party line without questioning, and somehow noone ever broke the pact... is what makes any other conspiracy theory laughable in the first place. Governments and secret agencies hardly ever manage to keep a secret when more than 2 people know it, but somehow millions of astrophysicists all decided to ignore Arp's evidence... and none of them squeaked to the press yet. Amazing. Bloody amazing, that's what it would be.

    And so on, and so forth.

    Arp wasn't some heretic oppressed by the mainstream High Priests, because there was no such mainstream consensus yet. His hypothesis was actually taken as a very serious possibility at the time, and had to pass the same standards for proof as anyone else's hypothesis. It just happened that another (now) theory fit the actual measured data better. That's all. No more and no less.

    So, you know, far from me to keep you from fighting crackpot crusades, if that's what keeps you feeling important. But, please... There are better ones than this kind of thing.

    --
    A polar bear is a cartesian bear after a coordinate transform.
    1. Re:Ah, a crackpot... how cute by pln2bz · · Score: 1

      The consensuses you speak of -- dark matter, dark energy, the Hubble Constant, the expansion of the universe -- are no more physical than laboratory experimentation, the fossil record or eyewitness accounts. And yet, you appear to be unaware that all three contradict these consensuses. Like others, you err when you lower your standard to what is most popular and commonly taught in school, and then you fill the void you created for yourself by limiting your own reading materials with the idea that that it can only happen by conspiracy. But then, if you never read enough of the alternative cosmologies to actually formulate a meaningful opinion of them, like 99% of the others on this forum, then why is a conspiracy even necessary? Do you not see that it is your own collective decision to not take other cosmologies seriously that is the cause of the misunderstanding? If people are convinced that we are on the verge of understanding the universe, then why would they investigate any alternative models? This is more than sufficient as an explanation for why astrophysics has become a meaningless thought experiment.

      Explain to me why electrical plasmas in the dark mode are *not* dark matter, and we can count together the number of assumptions you had to make to get to that point.

      I've read quotes from the scientists writing the textbooks on supernovae that the physics of supernovae within textbooks are only best guesses. And yet, an entire theory of expansion has been based upon this speculation.

      You act as if the Astrophysical Journal is some completely altruistic journal, free of any politics. You ignore the fact that Arp's paper was outright dismissed when first submitted because it was reviewed by Chandrasekhar. Is this not even slightly improper for you?

      You appear to not realize that there is a very long history of scientists dismissing the idea that space plasmas can be electrical, all the way back to the time when Sydney Chapman refused to even look at Kristian Birkeland's terrella in operation. Many years after it finally became accepted that the aurora is created by electrical currents in space generated by the Sun, Chapman still continued to criticize Birkeland's work. Why would things have changed?

      Many astrophysicists do not even realize that Hannes Alfven pleaded with scientists to drop the frozen-in magnetic field concept during his Nobel Physics acceptance speech (the prize being given for magnetohydrodynamics, of course). It's simply not something that is taught, and no conspiracy is needed to explain it whatsoever.

      I'm quite sure that you are completely unaware that both alligator and coral reef fossils have been found at *all* latitudes of the Earth for multiple periods of time. People are so quick to explain away such findings (which even Lyell confirmed were highly enigmatic) that they do not investigate it enough to realize that moving poles or continents cannot fully explain it. And yet, we see other planets in our own solar system where the temperature is rather uniform, and even warmer at the poles. Even better, most of you guys consider the concept of the Garden of Eden as a religious concept, completely unaware that numerous cultures of all types refer to the time before farming using the same exact details.

      Please tell me: what is it about the *assumption* of uniformitarianism that you find so compelling? Is it absolute dating? Have you actually read about any of the studies of dating techniques that demonstrated that the method is systemically flawed? How about this ...

      "The radiocarbon method is still not capable of yielding accurate and reliable results," wrote R. E. Lee. "There are gross discrepancies, the chronology is uneven and relative, and the accepted dates are actually selected." - R. E. Lee, "Radiocarbon: Ages in Error," ANTHROPOLOGICAL JOURNAL OF CANADA, 19 (1981), p. 27

      According to R. Stuchenrath, whom Lee cites, the "whole blessed thing is nothing but 13th century alchemy and it all depend

      --
      "A man cannot begin to learn that which he thinks he already knows." --Epictetus, 1st Century A.D.
  80. Sooooo... by jgoemat · · Score: 1

    Please, for the love of god remember, there are two forms of logic, inductive which has arguments from experience (physics), and deductive which has arguments from pure reason (mathematics). Only deductive arguments can be proven because you can always argue with the strength of the evidence in inductive claims. It is a fact (supported by inductive evidence and deductive proofs) that inductive claims may be false no matter how strong the evidence for them is. Thus they can never be proven, but you can say "there are strong practical reasons to believe."

    The error you make is in assuming that article summaries on Slashdot should be read as if they were scientific papers. The common use of the word "prove" is appropriate here. You can't remove the usage of the word from our language. I can 'prove' I have a driver's license by showing it to you. By your reasoning that wouldn't prove I had a driver's license because the claim could be false no matter how strong the evidence is.

    1. Re:Sooooo... by sentientbrendan · · Score: 1

      >The error you make is in assuming that article summaries on Slashdot should be read as if
      >they were scientific papers.

      This is rudimentary logic we're talking about, not some high level jargon. If you can't make your sentences logically coherent, then you have no business saying anything ever. Saying something nonsensical is not contributing to a discussion.

      Also, there's a difference between someone having a different definition of the word prove in a given context, and someone simply not knowing what the word prove *means*. The article summary clearly didn't understand the meaning of the word prove in any sense, and was just spouting nonsense. There was no logically coherant interpretation of the sentence.

  81. Re:Hundreds of black holes found by gr8scot · · Score: 1

    I wonder, though, why some seem to enjoy hate-mongering so much more than others.

    --
    All 19 hijackers were known terrorists 09-10-2001. Lack of FBI intelligence does not justify warrantless wiretaps..
  82. Re:Hundreds of black holes found by gr8scot · · Score: 1

    As with anything, really, the more popular the idea, the stupider it is -- so it is with the P.C. notion of ultimate equality and myopia with regard to hereditary intelligence and behavior.
    The notions of tolerance and universal rights, which some morons call "P.c.", are relatively recent and uncommon in human history. The idea of the inherent superiority of one's own tribe or race, on the other hand, is quite popular among primitives.
    --
    All 19 hijackers were known terrorists 09-10-2001. Lack of FBI intelligence does not justify warrantless wiretaps..