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Pluto's 3 Moons and a Probe to Study Them

It doesn't come easy writes "For those of you keeping score, Pluto now officially has three moons, with more possibly to follow. The newfound moons orbit about 27,000 miles (44,000 kilometers) from Pluto, more than twice as far as Charon, Pluto's other satellite. They are 5,000 times dimmer than Charon. The moons were found using the Hubble Space Telescope. For now, Pluto is the only Kuiper Belt object known to have satellites. Some nice images of Pluto and its moons are included in links. Enjoy!" Relatedly IZ Reloaded writes "NASA says the Atlas 5 rocket that will carry the New Horizons Pluto probe has suffered slight damage thanks to Hurricane Wilma. New Scientist reports: "The Atlas 5 rocket stands within a construction hangar at Cape Canaveral Air Force Station on Florida's east coast. As Wilma rolled though the region on 24 October, fierce 122-kilometer-per-hour winds tore holes in the hangar's 83-meter-tall door and caused minor damage to the rocket inside.""

143 comments

  1. Well, this is going to be rather interesting... by martinultima · · Score: 2, Interesting

    Now that Pluto's been confirmed to have more than one moon, what will than mean for the old debate over whether Pluto or Charon's the actual planet? Ought to be fun to watch...

    --
    Creative misinterpretation is your friend.
    1. Re:Well, this is going to be rather interesting... by nofx_3 · · Score: 1

      I am not a pro astronomer or anything, but I am always fascinated by this stuff. Particulary in this case, although I don't have any emperical data, if I had to guess I would say Pluto/Charon + moons started as a single Kupier object or planet, but some catastrophic impact caused the original object to shatter into these pieces, so technically it would all be one object right? Anyhow my thought process for this theory is that an object with a mass as small as what Pluto has is unlikely to have gathered the material to form an acreation disk in which moons may have formed. My other theory would be that Pluto had just enough mass to capture these objects as the came by, this second theory may also account for the inclination of Pluto's orbit to the rest of the planets orbiting the sun, and also the highly elipitical orbit the object exhibits. If Charon is only slightly less massive than Pluto, and Pluto captured it in this manner, the orbit would certainly be altered significantly, so if Pluto formed in the acreation disk of the sun and then captured these objects later, it may just have ended up in its current state.

      --
      Visualize Whirled Peas
    2. Re:Well, this is going to be rather interesting... by Larryk12308 · · Score: 1

      Poor Pluto. Last year they said it should no longer be considered a planet. But there was such an uproar they decided to reinstate Pluto as our ninth planet. It's traditional! I feel we should wait until we know about how planets behave in other solar systems. Do most of them orbit along the same plane, or are they scattered every which way? Is there anything like a Kuiper Belt or an Oort Cloud in their outer regions? With any luck in the year 2015 the new probe will be sending back tons of new data about Pluto and all it's neighbors. Chances are allot of theories are headed for the trash heap. clyde T. would love it! LarryK Schenectady NY

  2. Hey now! by rackhamh · · Score: 3, Funny

    There will be no moon probing while I'm around!

    1. Re:Hey now! by mctk · · Score: 5, Funny

      Those aren't moons. Those are space stations.

      --
      Paul Grosfield - the quicker picker upper.
    2. Re:Hey now! by Anonymous Coward · · Score: 0

      Just thank your lucky stars that it's Pluto we're talking about and not Uranus...

    3. Re:Hey now! by Anonymous Coward · · Score: 0
    4. Re:Hey now! by SamSim · · Score: 1

      They're too big to be space stations!

    5. Re:Hey now! by uberjoe · · Score: 1
      Those aren't moons. Those are space stations.

      How many Bothans died to bring you that information?

      --

      The days of the digital watch are numbered.

    6. Re:Hey now! by bdcrazy · · Score: 1

      23.2, one was slightly maimed.

      --
      Tonights forecast: Dark. Continued dark throughout most of the evening, with some widely-scattered light towards morning
  3. No confirmed by Anonymous Coward · · Score: 3, Informative

    So not official. RTFA. That's no moon....that's a canditate.

  4. that's really cool by kalpol · · Score: 0, Flamebait

    And they are still going to scrap this suck-ass telescope, right?

    --
    12:50 - press return.
  5. Nice? by lucabrasi999 · · Score: 4, Interesting
    some nice images of Pluto and its moons are included in links

    Nice? The photographs are a bunch of small white dots! Does anyone else see real photographs? I guess he is referring to the "artistic conceptual drawings"

    1. Re:Nice? by Kazuma-san · · Score: 1

      Nice? The photographs are a bunch of small white dots! Does anyone else see real photographs? I guess he is referring to the "artistic conceptual drawings" imho the quality of the pictures is kinda nice. you can clearly see the objects and that's what counts

    2. Re:Nice? by l2718 · · Score: 4, Insightful

      A bunch of small white dots is very good, actually. The fact that both Pluto and Charon come out as extended objects in the short exposure picture is quite impressive in its own right. I wonder if the long exposure has better resolution or is smeared due to an imprefect correction for the relative motion of the telescope and Pluto. Any astronomers reading this?

    3. Re:Nice? by Black.Shuck · · Score: 3, Informative

      Does anyone else see real photographs?

      The Wikipedia is currently exhibiting the best true-color image of Pluto to date:

      http://en.wikipedia.org/wiki/Pluto

    4. Re:Nice? by einhverfr · · Score: 3, Informative

      Nice? The photographs are a bunch of small white dots! Does anyone else see real photographs? I guess he is referring to the "artistic conceptual drawings"

      I disagree. For those of us who get excited about these things, they are actually really cool. For anyone who spends much time in front of a telescope, these are quite exciting.

      Now, in terms of whether Pluto is a planet or not... It is clear that it did not form from the same planetary disk that spawned the planets from Neptune on in. It does not appear to be made of the same material, nor does it appear to be close to the plane of the ecliptic. Mars's moons are different and were clearly captured as well though probably from the asteroid belt where planetary formation was disrupted by the gravity of Jupiter (though I suspect that our moon was formed along with the earth in the same band-- the fact that the moon is a near perfect sphere, and that it is within a couple degrees of the ecliptic support this hypothesis I think better than the idea that either the moon was ejected from the earth or that it was captured). Pluto as the nearest of the large KBO's provides many opportunities to study issues involving comet formation and even the dynamics which may have brought the precursors of life to our planet.

      --

      LedgerSMB: Open source Accounting/ERP
    5. Re:Nice? by DocMax · · Score: 1

      Reading that response, I completely expected to get to this Wikipedia entry.

    6. Re:Nice? by Skye16 · · Score: 1

      How does the moon's distinct lack of heavier elements fall in line with the moon being created at the same time? The mars-sized-object striking a young, hot Earth and ejecting the materials one would find in our crust (rather than the iron and nickel and what-have-you in the center) explains the composition part extremely well. I'm not so sure both the Moon and the Earth forming at the same time would result in the same composition we have here (and I was under the impression quite a few computer models "proved" (take with a grain of salt) that this could not be the case).

      Granted, I only had a pair of Astronomy courses, but the man with the Doctorate was pretty firmly convinced of the impact-ejection model. That's not to say he's definitely right, but from what he said, and what I've read in the mean time, this seems to be _the_ prevailing theory.

      Maybe I'm just not reading the newest material, though. It's very possible. I do love astronomy, but I don't keep up with it nearly well enough to even be considered a novice.

    7. Re:Nice? by Black.Shuck · · Score: 1

      That would have been the best technicolor image. ;)

    8. Re:Nice? by Hynee · · Score: 1
      ... I suspect that our moon was formed along with the earth in the same band-- the fact that the moon is a near perfect sphere, and that it is within a couple degrees of the ecliptic support this hypothesis I think better than the idea that either the moon was ejected from the earth or that it was captured

      The most plausible theory for the formation of the Moon is that the earth was hit by a Mars-sized body, and a bit proto-earth mantle blobbed up, found its way into orbit, and became the moon.

      The capture hypothesis is the default, but basically doen't work because of gravitational mechanics. The chances of the moon coming in at the right speed and angle are too low.

      The fact that the moon is a good sphere doesn't really rule out any hypothesis. It's big enough to so that it must be round, because it would have to have become molten when it formed (all the gravitational energy from all the mass collapsing in).

      I suspect the fact that it's orbit is close to the ecliptic doesn't tell much about its formation either, because of post-formation tidal forces and nudges from other solar system objects, but I'm not sure about this one.

      --
      Damn, I already moderated this topic. Now I'll have to log in with my sock puppet to comment.
    9. Re:Nice? by einhverfr · · Score: 1

      The most plausible theory for the formation of the Moon is that the earth was hit by a Mars-sized body, and a bit proto-earth mantle blobbed up, found its way into orbit, and became the moon.

      But this theory was mandated by a theory (that carbonaceous chondrites were the original planetessimals) that has suffered some serious setbacks in the last couple of years. The question is: If the moon was co-formed with the earth, why are the elemental makeup of the body so different? The answer that the impact theory postulates is that the moon was formed by material from the Earth's crust.

      For this theory to work, Earth must have had a very low axis tilt (so that the angular momentum of the ejection mass was close to the ecliptic), and the object must have hit close to the equator but also had managed to knock the earth off its axis (to the angle it is in today). I just don't see this happening in any scenario I can run through quickly in my head.

      Now, if you subscribe to the carbonaceous chondrite theory, then the impact emission theory of the genesis of the moon explains the composition thereof. But if this theory goes, then it seems to me that there are alternatives that seem more likely for the question of the formation of the moon.

      Captured objects are generally far from the ecliptic (Phobos, Deimos, Pluto). Phobos and Deimos are not terribly spherical and look more like captured asteroids than like co-formed moons.

      I am not a professional astronomer, but I am not entirely uninformed.

      --

      LedgerSMB: Open source Accounting/ERP
    10. Re:Nice? by Anonymous Coward · · Score: 0

      Due to thermal motion in the atmosphere, you experience what is called "atmospheric seeing". This is the major source of blurring of the images, and can be corrected for using complicated optics (adaptive optics being one type) which adjust mirror segments many times a second focus the image as much as possible. Of course this gets harder to do over longer time periods, and more smearing is seen.

    11. Re:Nice? by Hynee · · Score: 1

      But this theory was mandated by a theory (that carbonaceous chondrites were the original planetessimals) that has suffered some serious setbacks in the last couple of years. The question is: If the moon was co-formed with the earth, why are the elemental makeup of the body so different? The answer that the impact theory postulates is that the moon was formed by material from the Earth's crust.

      Interesting, what are the setbacks? As for the composition differences, there basically automatic in the theory. If the two bodies mixed well, they'd be the one body forever. The moon and the earth have the same Oxygen isotope ratios, which supports the impact theory.

      For this theory to work, Earth must have had a very low axis tilt (so that the angular momentum of the ejection mass was close to the ecliptic), and the object must have hit close to the equator but also had managed to knock the earth off its axis (to the angle it is in today). I just don't see this happening in any scenario I can run through quickly in my head.

      I had assumed that either the original study had taken care of this, but maybe not. As for running it through your head, I thought it basically has to be done through supercomputer, because it's not just a 2 body collision. Conservation of Angular Momentum would play an important role, so and the direction that the proto-moon blobbed out would be fairly aribitrary, so I would guess it just turned out that the earth ended up with an AM vector pointed at 23.5 degs to the ecliptic. Even then, I've read that the earth's axis tilt has shifted significantly since that time, not just through precession.

      In any case, a quick google shows that they haven't run through all the different impact angles and resulting angular momenta for this anyway.

      Captured objects are generally far from the ecliptic (Phobos, Deimos, Pluto). Phobos and Deimos are not terribly spherical and look more like captured asteroids than like co-formed moons.

      The question is did/could tidal forces either from the earth or other planets cause the moon's orbit to migrate to the ecliptic? Phobos and Deimos would be immune because they could easily be recent captures.

      But if this theory goes, then it seems to me that there are alternatives that seem more likely for the question of the formation of the moon.

      This is where you trot out your goofy theory... ;-)

      I'm not a pro astronomer either.

      --
      Damn, I already moderated this topic. Now I'll have to log in with my sock puppet to comment.
    12. Re:Nice? by einhverfr · · Score: 2, Informative


      Interesting, what are the setbacks?


      Take a look at http://carnegieinstitution.org/news_980917.html

      The basic problem is that the iron/silicon ratios of C1 carbonaceous chondrite meteorites matches the composition of the earth, but new data from the Pathfinder is raising doubts as to whether Mars has the same ratios (as previously thought). If this data continues to hold up it means that C1 carbonaceous chondrites may have helped form Earth, but Mars joins Mercury as an inner planet not formed from them. And as we lack sufficient data from Venus to say for sure, a theory which has been the mainstay of 40 years seems somewhat in peril.

      The moon and the earth have the same Oxygen isotope ratios, which supports the impact theory.

      Indeed it does seem to support that theory over a coformation theory. However, given the way these are calculated, I don't have enough information to comment further (most of these are the 16Oxygen(16O)/17O v. 16O/18O and plotting this as a line. Though it seems to me that regardless of which theory one wants to support, I would expect the rocks to be fairly rich in 16Oxygen, either due to centrigul action or due to reactions with warm ocean water).

      Conservation of Angular Momentum would play an important role, so and the direction that the proto-moon blobbed out would be fairly aribitrary, so I would guess it just turned out that the earth ended up with an AM vector pointed at 23.5 degs to the ecliptic.

      This is my problem. If angular momentum is being conserved, and if the tilt of the axis is even half of where it is now then one would expect the moon to follow an orbit near the celestian equator at the time it separated. I don't see tidal forces being that great in in these cases. But I could be wrong. Now, tidal forces combined with a maliable proto-moon could account for the spherical shape.

      Just some thoughts...

      --

      LedgerSMB: Open source Accounting/ERP
    13. Re:Nice? by Razor+Sex · · Score: 1

      Phobos and Deimos are thought to be captured asteroids. They are nowhere near the size of Luna, and Mars does exist next to the asteroid belt.

    14. Re:Nice? by DerekLyons · · Score: 1
      Nice? The photographs are a bunch of small white dots! Does anyone else see real photographs? I guess he is referring to the "artistic conceptual drawings"

      I disagree. For those of us who get excited about these things, they are actually really cool. For anyone who spends much time in front of a telescope, these are quite exciting.

      And there is the problem with the public and science/space in general. They've come to believe that unless it's flashy - it's boring and pointless.
    15. Re:Nice? by AragornSonOfArathorn · · Score: 1

      Um... if you had RTFA, you would have known they used the Hubble _SPACE_ telescope for these shots. There's no atmosphere to get in the way.

      --
      sudo eat my shorts
    16. Re:Nice? by Hynee · · Score: 1

      Take a look at http://carnegieinstitution.org/news_980917.html

      Interesting paper, but doesn't really make a difference to the Moon/Earth compositional difference. It's just saying that the "C1 model" doesn't hold for Mars. If it didn't hold for the moon, then maybe that's because it lost a lot of it's native material during the Earth/Theia impact, and Theia did fit the C1 model--or not. Or maybe the moon is captured, and it does or it doesn't fit the C1 model.

      Conservation of Angular Momentum would play an important role, so and the direction that the proto-moon blobbed out would be fairly aribitrary, so I would guess it just turned out that the earth ended up with an AM vector pointed at 23.5 degs to the ecliptic.

      This is my problem. If angular momentum is being conserved, and if the tilt of the axis is even half of where it is now then one would expect the moon to follow an orbit near the celestian equator at the time it separated.

      Yeah, I see what you're saying, but (a), what I said before, I don't know what tidal forces can do to these things, specifically the inclination of the proto-moons orbit, and (b), maybe Theia hit at the right trajectory to give the proto-Earth/Theia blob a tilt of about 23 degrees, and then a little bit (say 5%) into a low inclination orbit, maybe following the original trajectory of theia, of which 1.2% became the moon (yep, the moon is 1.2% of the mass of the Earth). This would make hardly any difference to the Earth-Theia blob's AM, so it may have nudged the vector up or down a bit. I think that's another of the successes of the Earth/Theia theory, it accounts for the axial tilt of the earth, and the Moon's orbital properties don't really come into that.

      Anyway, good chatting, I think I've said enough.

      --
      Damn, I already moderated this topic. Now I'll have to log in with my sock puppet to comment.
    17. Re:Nice? by CheshireCatCO · · Score: 1

      Er, the Kupier Belt Objects (including Pluto) formed in the same disk as the rest of us. Where do you think they formed and from what? And the compositions of these bodies are quite consistent with the rest of the planets, provided you realized that there was a temperature gradient in the disk so that the inner parts were hot and ices couldn't condense out of the gases. (Giant planets only have gas envelopes because they're big enough to. If they had never gotten that large, they'd be made of pretty much the same stuff as Pluto.)

      That doesn't make KBOs planets, though. The asteroids also formed in this disk, but major planets they ain't.

  6. No other Kuiper Belt Objects have moons?!? by Anonymous Coward · · Score: 5, Informative

    For now, Pluto is the only Kuiper Belt object known to have satellites.

    My good friend UB313 would have to disagree.

    There are actually several known KBOs with moons. Or was the submitter being overly litteral and meant multiple moons?

    1. Re:No other Kuiper Belt Objects have moons?!? by Dasher42 · · Score: 1

      Anyone that had read TFA or other articles linked here would have to disagree as well. Stupid /. editors.

    2. Re:No other Kuiper Belt Objects have moons?!? by Rei · · Score: 4, Informative

      Not only does Xena have a moon (Gabrielle), but so does Santa (Rudolph). Yes, for those who didn't know, there are minor planets out there whose discoverers not only want to name them after fictional lesbian TV characters, but also Santa Claus and the Easter Bunny.

      I don't know what the submitter was thinking when they wrote that statement.

      --
      "99 dead duelists of Dios on the wall. 99 dead duelists of Dios! Take one's ring, pass it around..."
    3. Re:No other Kuiper Belt Objects have moons?!? by Anonymous Coward · · Score: 0

      Does UB313 have a friend named UB40?

    4. Re:No other Kuiper Belt Objects have moons?!? by jd · · Score: 1

      Depends. If it's a planet, but not counted as such, it would be a One In Ten.

      --
      It's a small world and it smells funny; I'd buy another if it wasn't for the money; Take back what I paid (SoM)
    5. Re:No other Kuiper Belt Objects have moons?!? by cheesygrapes · · Score: 1

      And according to Caltech, 10% of objects in the Kuiper belt have moons. So unless there are only ten objects there, Pluto isn't even close to being the only object with satellites.

    6. Re:No other Kuiper Belt Objects have moons?!? by spaceyhackerlady · · Score: 1
      fictional lesbian TV characters

      Xena and Gabrielle were never characterized as lesbian. Yes, they played around, and the writers and producers had a field day with the lesbian subtext. But subtext is all it ever was.

      Sigh.

      ...laura

    7. Re:No other Kuiper Belt Objects have moons?!? by Rei · · Score: 3, Insightful

      It was more than subtext. How about the episode where Gabrielle, at the end after much buildup, comes out as a "thespian"? Or how about the episode in which Xena has her mind in Bruce Campbell's body, and sleeps with Gabrielle? Or how about the episode where the reality show follows them around discusses the nature of their relationship? It was a running joke that they were lesbians, and there was no attempt to hide it - they played it up every chance they got (one character trapped underwater, another has to dive down and kiss to give air, etc). Check out this search. There was an interview that I ran into a while ago in which one of the creators explicitly stated (to paraphrase) "We've always tried to keep it vague... but yeah, they're lesbians.", but in my attempt to search for it, I ran into some pictures that I distinctly did not want to come across while at a work PC, and terminated my search promptly (you can look for it yourself).

      --
      "99 dead duelists of Dios on the wall. 99 dead duelists of Dios! Take one's ring, pass it around..."
    8. Re:No other Kuiper Belt Objects have moons?!? by saltydogdesign · · Score: 1

      I think the poster meant to say that Pluto is the only Kuiper Belt object known to have multiple satellites. At least, that's what I read on Reuters this morning.

      --
      // This is not a sig.
    9. Re:No other Kuiper Belt Objects have moons?!? by Spunk · · Score: 1

      I, for one, welcome our fictional lesbian overlords.

    10. Re:No other Kuiper Belt Objects have moons?!? by Anonymous Coward · · Score: 0

      I'd like to point out that 'Xena' 'Gabrielle' 'Santa' and 'Rudolph' are all informal names or "nicknames" in common parlance. The provisional names according to the IAU (International Astronomical Union) are respectively, 2003 UB313, S/2005 (2003 UB313) 1, 2003 EL61, and S/2005 (2003 EL61) 1. These objects will not have official names until they are accepted by the IAU and they will be different than the nicknames already used.

    11. Re:No other Kuiper Belt Objects have moons?!? by adavies42 · · Score: 1

      You forgot to mention the fourth-to-last ep, "Many Happy Returns", which was all the evidence any remaining sceptic needed. Xena's birthday present to Gabrielle is to take her to a recitation by Sappho (!), and when they can't make it due to plot complications, she reads her a love poem herself instead. Then they quite literally fly off into the sunset, courtesy of some of Hermes' hardware. I prefer to think of that ep as the series finale, rather than the miserable Japanese eps.

      --
      Media that can be recorded and distributed can be recorded and distributed.
      -kfg
  7. Quite a few KBO have moons by Anonymous Coward · · Score: 5, Informative

    Unlike what the poster said, Pluto is not the only one with a moon.
    Various other KBOs do, including Xena :
    http://www.planetary.org/news/2005/xena_moon_1003. html

    1. Re:Quite a few KBO have moons by snake_dad · · Score: 1
      Indeed. From a different website (emphasis mine):

      "If, as our new Hubble images indicate, Pluto has not one, but two or three moons, it will become the first body in the Kuiper Belt known to have more than one satellite," said Hal Weaver of the Johns Hopkins Applied Physics Laboratory, Laurel, Md. He is co-leader of the team that made the discovery.

      --
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  8. As usual, Lovecraft foresaw this by Yeechang+Lee · · Score: 3, Informative
    [A] new ninth planet has been glimpsed beyond Neptune, just as those influences had said it would be glimpsed. Astronomers, with a hideous appropriateness they little suspect, have named this thing "Pluto." I feel, beyond question, that it is nothing less than nighted Yuggoth - and I shiver when I try to figure out the real reason why its monstrous denizens wish it to be known in this way at this especial time. I vainly try to assure myself that these daemoniac creatures are not gradually leading up to some new policy hurtful to the earth and its normal inhabitants . . . Sometimes I fear what the years will bring, especially since that new planet Pluto has been so curiously discovered.
    "The Whisperer in Darkness" (1930)
    I hope we have our XK-PLUTO nuclear-powered bombers ready for the Old Ones. Me? I'm going to take a little trip to XK-Masada.
    1. Re:As usual, Lovecraft foresaw this by plopez · · Score: 1

      Damn! I just read that this weekend (a colder war, not the lovecraft story). Loved the ending. Am now reading up on "The Yellow King".

      --
      putting the 'B' in LGBTQ+
    2. Re:As usual, Lovecraft foresaw this by floron · · Score: 0

      That...was...awesome! ta for posting the link.

    3. Re:As usual, Lovecraft foresaw this by NeoSkandranon · · Score: 1

      That novelette is freakin awesome. Reads almost like a Delta Green campaign from Chaosium.

      --
      If you can't see the value in jet powered ants you should turn in your nerd card. - Dunbal (464142)
    4. Re:As usual, Lovecraft foresaw this by Anonymous Coward · · Score: 0

      Hey, dummy, the Fungi are NOT the Great Old Ones. You are SO not allowed in my cult.

  9. Or by Rosco+P.+Coltrane · · Score: 5, Funny

    Pluto now officially has three moons

    More like "four big asteroids are gravitating around each other beyond the orbit of Neptune".

    --
    "A door is what a dog is perpetually on the wrong side of" - Ogden Nash
    1. Re:Or by Rei · · Score: 1

      If Pluto had captured asteroids, that would be huge news ;) Talk about a funny game of orbital billiards....

      --
      "99 dead duelists of Dios on the wall. 99 dead duelists of Dios! Take one's ring, pass it around..."
    2. Re:Or by Anonymous Coward · · Score: 0

      Well, to a creature on Jupiter, Earth is just a large, uncaptured, moon with an asteroid going around it.
      Its all how you look at it.

    3. Re:Or by adavies42 · · Score: 1

      More like a smaller moon. To a Jupiteranean(?), Luna would look awfully similar to their big four, not like an asteroid at all.

      --
      Media that can be recorded and distributed can be recorded and distributed.
      -kfg
  10. Remember by eclectro · · Score: 1, Funny


    Pluto is a planet, not an object. Anything else is either cultural revisionism or solar system wide discrimination.

    --
    Take the cheese to sickbay, the doctor should see it as soon as possible - B'Elanna Torres, "Learning Curve"
    1. Re:Remember by lucabrasi999 · · Score: 1
      solar system wide discrimination.

      Planetary Discrimination? Somebody call the EEOC!!

  11. Actually... by jd · · Score: 1

    ...it's not even official yet. The objects are believed to be orbiting Pluto, but there has been no independent confirmation they actually are, and the IAU hasn't (yet) responded to the submitted claim.

    --
    It's a small world and it smells funny; I'd buy another if it wasn't for the money; Take back what I paid (SoM)
    1. Re:Actually... by Rosco+P.+Coltrane · · Score: 4, Funny

      ...it's not even official yet

      Okay then: "two big asteroids are known to be orbiting around each other beyond Neptune, but two more are presumed to have joined the party, which incidentally pisses Neptune off to high heavens".

      --
      "A door is what a dog is perpetually on the wrong side of" - Ogden Nash
    2. Re:Actually... by jd · · Score: 1
      Ah, but Neptune is inside Pluto's orbit, so isn't in as high a heaven as it was in. :) And if the Romans were anything to go by, the only thing pissing Neptune off would be that it wasn't invited.


      Incidently, the CNN report mentions that the astronomers called them the Halloween Moons - I didn't know Eric Raymond was an astronomer!

      --
      It's a small world and it smells funny; I'd buy another if it wasn't for the money; Take back what I paid (SoM)
  12. Pluto has 3 moons? by Viper+Daimao · · Score: 4, Funny

    Does that mean we can call them "Cerebus" collectively?

    --
    "In the game of life, someone always has to lose. To me, if life were fair, that someone would always be Oklahoma." -DKR
    1. Re:Pluto has 3 moons? by darklordyoda · · Score: 1

      Nope, it's copyrighted. "Cerberus", however, is not.

    2. Re:Pluto has 3 moons? by heptapod · · Score: 1

      If they're going to be called Cerebus, the IAU will have to put (c) Dave Sim after it. Plus after Sim kicks the bucket, Cerebus enters the public domain. Go Sim.

  13. Ah! Where else in the Galaxy... by jd · · Score: 1

    ...do even the jokes have dupes?

    --
    It's a small world and it smells funny; I'd buy another if it wasn't for the money; Take back what I paid (SoM)
  14. Hubble by GmAz · · Score: 0, Insightful

    Seems hubble is doing something useful every time you turn around. And NASA says the Hubble Telescope needs to be retired.

    --
    Click Click Bloody Click PANCAKES!
    1. Re:Hubble by Rosco+P.+Coltrane · · Score: 4, Funny
      Yeah, I can see why too:


      Dubya: we need to kill Hubble. We have more, erhm.., pressing needs for money
      Hubble astronomers: No wait! We found another Pluto moon !
      NASA: come on, we can't kill the thing, it's useful
      Dubya: hmm, I dunno...
      Astronomers: Wait! wait! anOTHER moon!!
      NASA: Wow
      Dubya: stop that...
      Astronomers: Hold on... HOLY CRAP, TEN MORE MOONS! and a black hole inside Jupiter too!!!
      Dubya: We're closing guys, you need to go home now...
      Astronomers: NO REALLY! LOOK! ALL THESE MOONS!!! ...

      --
      "A door is what a dog is perpetually on the wrong side of" - Ogden Nash
    2. Re:Hubble by Anonymous Coward · · Score: 0

      *Laughing Out Load*, I'd mod you funny...
      If only I had more karma to gain modpoints...
      *contemplates mischievously and searching for links to coral-cache*

    3. Re:Hubble by IntellectualCritic · · Score: 1, Troll

      Maybe if they found Iraq's WMD in Jupiter...

    4. Re:Hubble by Anonymous Coward · · Score: 0

      No, you'd mod him informative or insightful so he would get karma for it. Wait, you said it's a she? WHAT THE FUCK?

    5. Re:Hubble by Anonymous Coward · · Score: 0

      Dimwit.

      That joke is old and unfunny.

      Thanks for ruining a good post, asshole.

    6. Re:Hubble by Anonymous Coward · · Score: 0

      Oh, someone's bitter that his government is a bunch of liars...

  15. Classification by Da3vid · · Score: 4, Insightful

    Is it really a big deal when we name something a moon? Its just a matter of relativity. A planet, a moon, an asteroid, a rock... they're all the same thing, that varies by degrees. I suppose the things orbital path is of interest, but how much can we really learn just by applying labels? We didn't learn anything about the true scientific nature of those bodies, we just named them. I think I'll name them Susanna, Melinda and Jim.

    -Da3vid-

    1. Re:Classification by Rei · · Score: 2, Informative

      A body having at least one moon is very important for astronomers. By observing even a distant moon, you can get a good fix on its orbital dynamics. Knowing its orbital dynamics, you can determine with a good degree of accuracy how massive the body that has the moon is.

      There are all sorts of other benefits moons provide, by the way, as far as astronomy goes, from their chemical properties compared to those of the parent, to their diffraction of light from stars behind them.

      Having multiple moons isn't as important, but does raise some interesting questions; this discovery should kick off a brand new round of simulations trying to figure out how those things got there, since the assumed method of formation of Charon was a large collision and reformation. I'm guessing that these would have to be captured after the fact, but having such a large moon as Charon would probably make the capture process quite interesting. It should be neat to see the results.

      While I'm eager to see the results from New Horizons (yeah, we'll be waiting a long time!), I'm more interested in getting a flier to Titan, such as a helicopter, non-fixed-wing aircraft, fixed-wing aircraft, or derrigible. The second case sounds the most interesting, because it combines both high speed and low energy requirements. You land, recharge from your RTG while doing a surface study, then take off again (fixed wing can't land reliably, and helicopters and blimps are slower). Too bad there are no good Jupiter gravity assists for a while, so it would have to be a small craft, whatever gets sent.

      --
      "99 dead duelists of Dios on the wall. 99 dead duelists of Dios! Take one's ring, pass it around..."
    2. Re:Classification by CheshireCatCO · · Score: 2, Informative

      "Having multiple moons isn't as important, but does raise some interesting questions;"

      Actually, that isn't true. Particularly in the case of Pluto. Multiple moons certainly help refine mass measurements in the general case. In the case of Pluto, Charon is so large (compared with the parent) that you don't GET the mass of Pluto from an orbital period/distance measurement, you get the mass of combined system. (Technically, this is always true. But for most bodies, including all of the planets, the mass of the moon is negledgible.)

      Having a couple small moons which are a lot less massive than Pluto should let astronomers finally work out the correct relative masses of Pluto and Charon. Believe it or not, this is not known all that well.

    3. Re:Classification by Rei · · Score: 1

      My claim was that it "isn't as important". Lets look at the mass estimate for a moonless body, such as Quaoar: mass estimates I've seen for Quaoar range from 1.0e21 to 2.6e21 kg. Pluto, mostly thanks to Charon (although it helps that it's larger and closer) is known to, what, 1% or so? The majority of the mass clarification comes from the first moon discovered.

      --
      "99 dead duelists of Dios on the wall. 99 dead duelists of Dios! Take one's ring, pass it around..."
    4. Re:Classification by CheshireCatCO · · Score: 1

      It is actually pretty important. Quaoar's mass doesn't tell us that much, overall. The relative masses of Pluto and Charon are keen to constraining models of Charon's formation, something we're pretty keen on doing.
      I believe that the error on the mass of Charon is around 5-10%, actually. But I'd have to look that up to be sure since it's been years since I've let it keep me awake at night.

    5. Re:Classification by myowntrueself · · Score: 1

      Heres something I've been wondering about.

      We can detect and confirm solar system celestial bodies by spotting what we think is a new object then, if I understand this right, working out where it would have been x number of years ago and looking for it on photos from that time.

      If it shows up on the old photo where you predicted it would be, this confirms that you have a new object, right?

      This makes me wonder how effective we would be at detecting asteroid-sized objects moving around in the solar system under their own power; if we did catch a photo of one (at a great distance) and tried to work out where it was 10 years ago and look for it in 10 year old photos, we (quite probably) wouldn't find it and it would be put down to... what?

      --
      In the free world the media isn't government run; the government is media run.
  16. Kinda small... by Fermatprime · · Score: 1, Insightful

    These "moons" are only 30 and 100 miles across. Mars' Phobos and Deimos, widely thought to be captured asteroids, are thousands of kilometers across. These are PUNY. If we could somehow gather up all the junk orbiting Earth and pack it together, we'd probably have a "moon" about that size, too.

    --
    I hate the one hundred and twenty character limit for signatures with an all-enveloping, all-destroying, incredible pass
    1. Re:Kinda small... by l2718 · · Score: 3, Interesting
      These "moons" are only 30 and 100 miles across. Mars' Phobos and Deimos, widely thought to be captured asteroids, are thousands of kilometers across.

      You are way out of the ballpark, I'm afraid. These two new moon are larger than Phobos (diameter approx. 22Km) and Deimos (diameter approx. 12Km). The Earth (and its moon) Mars, Venus, Mercury, the Galilean Moons and Titan are thousands of kilometers across, but everything else is much smaller. Ceres (the largest asteriod) is only 914Km across.

    2. Re:Kinda small... by dex.pdx · · Score: 1

      Failed to compile: Mixed types in context of comparison!

    3. Re:Kinda small... by bloodstar · · Score: 1
      http://www.solarspace.co.uk/Mars/phobosdeimos.php

      Bzzt, hate to correct you, but Phobo and Deimos are TINY
      Phobos - 22.2km diameter
      Deimos - 12.6km diameter

      Hardly thousands of kilometers across and if they're going to be "moons" why not Plutos?

      --
      "The bass, the rock, the mic, the treble. I like my coffee black, just like my metal" - Mindless Self Indulgence
    4. Re:Kinda small... by Anonymous Coward · · Score: 0

      BS

      Phobos: 26 Km
      Deimos: 15 Km

      And that's the long axis.

      Luna: 3.5 Mm

      Check Factoids Before Posting

    5. Re:Kinda small... by Anonymous Coward · · Score: 0

      Thousands of km across? Blimy!

      According to wikipedia:
      Phobos: 22km diameter.
      Deimos: 12km diameter.

      30 miles is roughly 48km so the largest martian moon is smaller than the smallest plutonian moon.

    6. Re:Kinda small... by Anonymous Coward · · Score: 0

      Phobos and Deimos are about 22 km and 12 km in diameter. If they were thousands of kilometers across, we'd be able to see them with the naked eye from Earth.

    7. Re:Kinda small... by K.B.Zod · · Score: 2, Interesting

      The best thing Earth has after Luna in terms of a moon is probably Cruithne, and that doesn't even count as a satellite anyway.

  17. It not the only KBO to have moons. by geoswan · · Score: 0, Redundant

    The slashdot article says Pluto is the only Kuiper Belt Object to have a moon. Not so: Tenth Planet Has A Moon

    1. Re:It not the only KBO to have moons. by Da3vid · · Score: 1

      I think somewhere in the original article it actually says that Pluto is the only Kuiper Belt Object confirmed to have more than one satellite, although others are suspected.

    2. Re:It not the only KBO to have moons. by mralphabet · · Score: 1

      No, if you read the article it said Pluto is the only known Kuiper Belt object to have moonS. As in plural, as in more than one moon.

  18. Calling Pluto a planet in the first place by Da3vid · · Score: 2, Informative

    has really caused us a lot of grief in classifying heavenly bodies and discovering them. Not only does it interfere with scientific terminology, it hampers understanding of average people. We should just kick Pluto out and accept that we have 8 planets, not 9. Everyone would be happier (except Pluto).

    1. Re:Calling Pluto a planet in the first place by kindbud · · Score: 1

      Not only does it interfere with scientific terminology...

      Which termionology is that? Are you saying that there is a widely accepted definition of a planet that is not in the center of a controversy? Please, do tell. What is it?

      (there isn't one, don't bother trying to find it)

      If it were as cut and dried as referring to the definition of the term "planet" there'd be no controversy. Pluto would fit the definition, or it wouldn't. But there isn't a definition that has gained enough acceptance to settle the controversy. Many have been proposed, but none have become The Definition.

      --
      Edith Keeler Must Die
    2. Re:Calling Pluto a planet in the first place by Da3vid · · Score: 1

      That's my point. These boundaries should become more clear. Pluto specifically raises a lot of questions considering the KB, Charon, other asteroids, etc. A clearer terminology would increase understanding.

    3. Re:Calling Pluto a planet in the first place by Anonymous Coward · · Score: 0

      Search for plutoid.

  19. Depends... by jd · · Score: 1

    ...on where it kept them. The underworld is a BIG place to hide things you don't want discovered.

    --
    It's a small world and it smells funny; I'd buy another if it wasn't for the money; Take back what I paid (SoM)
  20. You got the scale wildly wrong by geoswan · · Score: 3, Informative
    What!

    Even if you rolled all the rockets we have ever launched, and all the fuel we packed into them, I doubt it they would form a sphere even a single kilometer in diameter.

    A Saturn V was about 20 meters in diameter, and about 100 meters tall, more or less. Volume of a cylinder is pi r^2 * length. That would make the volume of a Saturn V about pi * 2500 meters^3.

    The volume of a sphere is 3/4 * pi r^3. The volume of a sphere one kilometer in diameter would be pi * 93,750,000 meters^3. That would be volumne of something like the prelaunch volume of 37,000 Saturn Vs. The payload of a rocket is a fraction of the mass of the entire thing. Let's say 1%. Most rockets are much smaller than a Saturn V. Payloads launched into low earth orbits decay within decades, like Mir, or Spacelab.

    It wouldn't surprise me if the volume of all the working satellites, and space detritus, that remain in orbit would be less than the prelaunch volume of a single Saturn V.

  21. Fierce Winds?!? by LooseChanj · · Score: 1

    As Wilma rolled though the region on 24 October, fierce 122-kilometer-per-hour winds tore holes in the hangar's 83-meter-tall door

    Oh please, 'twas but a mere breeze. That hangar's falling apart anyway.

    --
    Mix the failings of Usenet with the shortcomings of the World Wide Web and the result is slashdot.
  22. That is why by jd · · Score: 2, Insightful
    I would be in favour of a classification system that DID mean something. For example, we know that the composition of all the rocky planets we've investigated and all of the Gas Giants is mixed. We also know they have a single core. Neither of these is proven (or disproven) for Pluto, but could be tested. We know that the composition statement is false for all asteroids and the single core is false for all comets. It would seem easy enough to base a classification system on such parameters.


    Would this help us any? Probably, yes. Because planets are of mixed composition, they must have formed in the very early accretion disc from the sun. Because asteroids and comets are relatively uniform, they must have formed AFTER centrifugal forces had separated out the elements - lighter elements to the outside (which is why comets contain a lot of hydrogen) and heavier elements towards the center (asteroids are based on iron and nickel, depending on location).


    The label, by this scheme, would then indicate composition, structure and time of formation, as these three properties are inter-related. On the other hand, we can go by mass or diameter and learn relatively little - which I suspect is the way the IAU will go, because that's something astronomers can measure easily. Easy != (interesing || useful). In this case, easy is pretty useless and will be subject to future argument.


    I'm sure there are better methods of classifying, but I firmly believe the only useful method of classification is one that will allow predictions to be made and tested. The periodic table of the elements, for example, as a way of depicting valence theory is exceptionally useful. You can make useful predictions about groups of elements or even individual elements, based on the position in the table. Astronomical classifications should be no less useful and (given that we've far more powerful ways of obtaining, classifying and representing data today than early chemists) really should be a far MORE (Moore?) powerful tool.

    --
    It's a small world and it smells funny; I'd buy another if it wasn't for the money; Take back what I paid (SoM)
    1. Re:That is why by CheshireCatCO · · Score: 2, Informative

      Oops, a lot of this is based on faulty data.

      First, we don't know that all eight planets have cores. The biggest of the lot, Jupiter, is currently an unknown. A new mission is in the works to test precisely this issue, though.

      Second, some asteroids DO have cores. And we're pretty certain that many more used to because that's where the metal-rich asteroids came from. (Break-up of larger asteroids which had differentiated.)

      Now, I'm not sure what you mean when you say that the "composition is mixed", but I can't seem to make that statement mean anything that's true of the planet's that's not true of Pluto. Pluto has a mixed composition or rock/metal and ices. It also most likely has a core. (Actually, as of last I checked, we're not really sure about the Moon, either. Which really says something.)

      The reason that size makes a popular criterion isn't so much that it's easy as that it's feisible. If you require a core as the test, then you pretty much require a spacecraft flyby (or even an orbiter). Which is tricky for a lot of bodies in our solar system and impossible for ones outside of it. As I said, we don't even know if Jupiter has a core, yet.

      There is a rumor, which comes from a reliable source, that the IAU stands a good chance of reversing the Pluto decision now. So stay tuned, we might win this yet :-)

  23. Re:astrology by einhverfr · · Score: 1

    You might be a troll but I am an astrologer....

    Absolutely nothing. From an astrological perspective, the moons will always be at the same place on your chart as Pluto and thus would make no difference to the chart's interpretation.

    I get sick and tired of astrologers needlessly multiplying entities by making postulates that are not only patently untrue but useless and stupid anyway, like the theory that there is a shadow earth in our orbit on the other side of the sun. If you want something more useful without the need to go to such unparsimonious ideas, there are always the Arabic Parts (the Part of Fortune being the most famous, but for questions of vegetable markets and plants, there is also the Part of Melons and Cucumbers).

    --

    LedgerSMB: Open source Accounting/ERP
  24. These terms don't just vary by degrees by Anonymous Coward · · Score: 0

    Calling it a 'moon' implies that it orbits something which orbits the Sun. Calling it a 'rock' wouldn't.

  25. Re:astrology by Anonymous Coward · · Score: 0

    "I get sick and tired of astrologers needlessly multiplying entities by making postulates that are not only patently untrue but useless and stupid anyway,"

    So... basically, you're sick of astrologers being astrologers? In as much as every scientific test ever run on astrological predictions has indicated that the theory doesn't work. And in as much as you have to postulate some as-yet unknown, unseen and apparently undetectable force between people and planets is what makes the whole thing work. But appart from that, you mean?

  26. say what? by Quadraginta · · Score: 1

    It is clear that it did not form from the same planetary disk that spawned the planets from Neptune on in.

    I don't understand this, can you elucidate? Are you saying there was another planetary disk at some other time? Or that Pluto and friends wandered in from interstellar space?

    1. Re:say what? by einhverfr · · Score: 1


      I don't understand this, can you elucidate? Are you saying there was another planetary disk at some other time? Or that Pluto and friends wandered in from interstellar space?


      There are other planetary disks around other stars. :-)

      And Pluto probably wandered in from the Kuiper Belt. Not sure if I consider this to be intersteller space or not. But it is certainly outside the rest of the solar system.

      --

      LedgerSMB: Open source Accounting/ERP
    2. Re:say what? by Razor+Sex · · Score: 1

      The Kuiper Belt starts within the orbit of Neptune, and only goes out to 49 AU. This is well within the solar system. The Oort cloud may be as large as 3 light years across.

  27. Another moon! by Anonymous Coward · · Score: 0

    If Pluto can get more moons, maybe Earth will start getting some new ones too!
    That'll be helpful when we've run over our current moon and can't fit any more people on it anymore.

  28. Fwiffo and a melnorme trader by Anonymous Coward · · Score: 0

    Can't you tell?

  29. Hmm.... by novus+ordo · · Score: 0

    What happened to the one they sent to URANUS?

    --
    "You're everywhere. You're omnivorous."
  30. Re:Nice? I am not a professional astronomer, but.. by einhverfr · · Score: 2, Interesting

    How does the moon's distinct lack of heavier elements fall in line with the moon being created at the same time?

    Well, there are usually two aspects to the impact ejection theory. The idea is that the earth was struck and:
    1) ejected dust that formed the moon and
    2) knocked the earth's axis so that it we have the tilt that generates the seasons.

    Now, there are two issues that I have with this theory:
    First, it presumes that the earth's equator was very close to the ecliptic. This is not something I can take for granted given that the tilts of other axes are:
    Neptune: 30 degrees
    Uranus: 98 degrees
    Saturn: 25 degrees
    Jupiter: 3.1 degrees
    Mars: 25.2 degrees
    Venus: 177.36 degrees
    Mercury: 0 degrees

    Of the eight major plants, axis tilts are sufficiently low to allow for this sort of idea only on Jupiter and Mercury. It seems unreasonale to me to think that planets such as Saturn were somehow knocked off axis by impacts. Also Venus has no moon and it seems unreasonable to indicate that it was knocked off its axis. Instead the axis of rotation seems to have been decided on a local variation.

    Even if one imagines that the earth had a very low axis tilt originally, the ability to simultaniously eject enough dust to cause the moon to form witnin six degrees of the ecliptic seems a bit of a stretch to me, especially since such an impack would *also* have had to occur nearly exactly on the equator and still managed knock the earth off its axis.

    The reason why these objections have generally been disregarded by the astronomical community is a theory which posits that a type of asteroid called "carbonaceous chondrites" formed the original planetessimals from which all rocky planets originated. While mercury never fit this model, it was generally assumed that these formed the basis for Venus, the Earth, Mars, etc. It was therefore believed that one would be able to form models of the interior structure of Mars consistant with the projections of this theory. As the moon clearly didn't fit, the impact theory nicely solved this problem.

    However, it now appears that the idea that carbonaceous chondrites form the basic building block from which rocky planets were formed has now had some very large holes torn in it in that no model which fits the existing data on Mars can support this theory of the formation of Mars. Absent this theory, I can think of no good reason to subscribe to impact-emission theory of lunar origins, as it seems simpler to think that the moon may have formed as a smaller dustball forming from lighter particles which ended up further from the early earth in the same way that the structure of the gas giant systems (the outer planets and their moons) mirrors structurally the Sun and inner planets.

    I could be wrong as I have no astronomy degree, but at least it is informed inaccuracy....

    --

    LedgerSMB: Open source Accounting/ERP
  31. Why more moons further out?? by Quadraginta · · Score: 1

    All right, I can understand that Jupiter, Saturn, Uranus and Neptune have zillions of moons because they're big mommas with a lot of gravity, and when you're very generously rounded -- well, you just naturally attract a lot of trash. Fact of life.

    But now even puny Pluto is getting into the act. Three moons, when Mercury has zero and Mars but two. What gives? Why are moons more common in a general way in the outer Solar System than the inner? This is odd. Is it all captured from the Kuiper Belt? Did the solar wind when the Sun was T-Tauri blow all the moon-making crap out of the inner system, but not the outer? Is there some reason why whirlpools in the nebula are more probably further out? Inquiring minds want to know!

    1. Re:Why more moons further out?? by CheshireCatCO · · Score: 1

      Well, you really only have Pluto to draw on for the outer solar system that isn't a jovian planet. There are a few KBOs with moons, but we also know of a LOT of KBOs. (... But we don't *know* how many of those might have moons, I don't think. They're awfully faint.) So it's a big vague. But a very insightful question :-)

      The answer is: it's easier to capture objects in the outer solar system because the spheres of influence are larger. To get into the region of space where Earth's gravity dominates over the Sun's, you need to be within 4 times the Earth-Moon distance. For Pluto, it's roughly twice that distance because the scaling increases linearly with distance from the Sun, but only as the cube-root of the mass.

      There's more to it than just that, alas. You need to lose energy to capture a moon (note that our Moon was formed in a different way, akin to how Charon probably formed). We're still boggling over that one in the Kupier Belt.

  32. Re:astrology by einhverfr · · Score: 1

    So... basically, you're sick of astrologers being astrologers? In as much as every scientific test ever run on astrological predictions has indicated that the theory doesn't work. And in as much as you have to postulate some as-yet unknown, unseen and apparently undetectable force between people and planets is what makes the whole thing work. But appart from that, you mean?

    Well, astrology as a detailed field probably lacks the ability to create atomic, testable hypotheses which can then be repeatably tested. So as a field it does not admit to the scientific method. Same with any other occult field. So to me science will likely never be able to prove or disprove astrology.

    Apart from that....

    Old-school astrology seems to be focused on observable planets (representing abstract concepts which can manifest in various ways) and on mathematical derivations thereof. The Arabic Parts, for example, are mathematic derivations of the position of sets of planets (if planets are words, Arabic Parts are sentences). If new concepts are required, they can be derived via new Arabic Parts (as per Guido Bonnatti's 12th century treatise). It was similarly believed that there was no mechanism by which astrology worked-- that charts had correlation-based rather than causation-based value (see Paracelsus's treatise on the subject-- that the planets are mere markers for aspects of the self).

    Now, new-school astrologers, feeling besieged by science have tended to try to pull the whole intelligent-design thing (only they did it first). The idea that the planets have some direct impelling force on us is quite frankly laughable. Similarly, they have abandoned the semantic constructs such as Arabic Parts in favor of imagined planets. Uranian astrology, for example, posits seven additional planets beyond Neptune. There are those who try to base things on some planet they call Vulcan (a Transpluto-based object), and there are those who believe that the sun hides a shadow earth in our orbit but on the other side of the sun.

    Furthermore, I have heard astrologers talk about appeasing the planets. WTF? Ok, maybe one can choose how some things manifest, but if one gets into the habit of appeasing lights in the sky, well, I will have nothing to do with that mentality.

    So you have pinned me down pretty well-- an astrologer being opposed to most of what goes on in modern astrology.

    --

    LedgerSMB: Open source Accounting/ERP
  33. Re:astrology by Anonymous Coward · · Score: 0

    What kind of astrology are we talking about, then, if not the theory that predicts people's futures? That is inherently a testable theory and it keeps failing. Which never disuades any of its adherents, as far as I can see. Just as I expect we won't disuade you here.

    So what DO you believe, if not in a predictive theory?

  34. Re:astrology by einhverfr · · Score: 1

    What kind of astrology are we talking about, then, if not the theory that predicts people's futures?

    Ok.... Let me explain a few things to you about my concept of astrology. First the most important form of astrology is personal (birth chart) astrology that tells people about themselves. Additionally we have the ability to look at the character of specific time frames (via solar return charts, progressions, transits), and answer specific questions (horary astrology, though many times, the chart just says: no definite answer at the moment).

    In each of these cases, the planets are stand-ins for extremely abstract semantic concepts. The entire chart is like a technical manual and one really needs the whole thing to say anything about it. In other words, the fact that the sun in someone's chart is in Scorpio has very little impact by itself. You also have houses, aspects, etc. that create a general picture. Because the planets are stand-ins for sufficiently abstract concepts, and because the chart is sufficiently complex, I think it is impossible to come up with atomic hypotheses which can be tested with any repeatibility. In essence, any scientific experiment I can think of would be so heavily flawed that I would expect (as an astrologer) that it would conclude very little correlation value in and of itself. In essence, I think that science has reasonably showed that there is no impelling force of the plantes. But I have never claimed there was (reread my prior post where I called this notion laughable).

    Instead, the planets represent abstract concepts which can manifest internally or externally in a variety of different ways (perhaps in different ways in different times). Free will exists within this framework because we have a fair bit of control over how things manifest. This is again in line with the older writings from Ptolomy to Paracelsus.

    --

    LedgerSMB: Open source Accounting/ERP
  35. Re:astrology by d0tcpp · · Score: 0

    "as-yet unknown, unseen and apparently undetectable force"

    Gravity is the basis of astrology. Much like the sun and moon control the tides on earth, so do the planets and stars. But they also manipulate the water molecules (humans are 75%(?) water) in our bodies. Similarly, electrical and magnetic fields (and electro-magnetic) to a lesser extent, from neighbouring celestial bodies also affects everyday life here on earth. A control of this "experiment" would be to remove all gravitational, electrical and magnetic forces from the earth and replay evolution. Life on earth would be very different from what it currently is.

    "I get sick and tired of astrologers needlessly multiplying entities by making postulates that are not only patently untrue but useless and stupid anyway"

    Ya me too. To date there hasn't been a single scientifically-backed comment made by astrologers anywhere that hasn't been labled as coincidence. Astrologers simply do not have the capacity to make any comments what-so-ever. Especially when new moons, stars, blackholes (etc.) are still being discovered. How reliable can these charts be...

    Giving astrologers their due, they suggested that human nature is controlled by celestial bodies. But do they serve any other purpose? I think not.

  36. If you're gonna use metric... by Anonymous Coward · · Score: 0

    ..then it's lowercase-k, and a space between the number and 'km'. Uppercase-K means kelvin.

  37. This feels like a publicity ploy by ZachPruckowski · · Score: 1

    Is this just an attempt to keep Pluto in the "planet" catagory? Because it seems like someone says "So what makes Pluto so special? We've got dozens of KBOs that big and bigger" and some people refuse to consider the idea that Pluto is nothing special. Now we suddenly have 3 moons on Pluto?

    I don't know. I'm probably just crazy, but it seems possible to me.

  38. Re:astrology by Anonymous Coward · · Score: 0

    Er, sure, we feel gravity. The water in our bodies does by EXACTLY the same amount (in terms of acceleration) as everything else. So why single out water? And why the planets and not the nearby mountains or houses which have MUCH greater gravitational pulls.

    Electromagnetic fields don't track, either. Earth's field is only 0.3-0.6 Gauss. And we don't even FEEL any fields from neighboring bodies since they fields are excluded by Earth's. (Also, the fields are terrifically weak this far away. The strength falls off very rapidly with distance.) And Venus and Mars don't even HAVE global fields, so why are they even included?

    Sure, if you got rid of gravity, live on Earth would be different. We wouldn't be on Earth, for one thing. And we wouldn't be adapted to gravity. But that statement has nothing to do with astrology at all.

    Just 'cause there are forces in the universe, it doesn't mean astrologers are right. None of the forces known behave as astrologers require them to. Anyone who knows even high school science should instantly recognize the fact that they're just throwing around terms without even trying to explain how things could possibly be doing what they claim.

    "Giving astrologers their due, they suggested that human nature is controlled by celestial bodies."
    Which, the Sun and the Earth? No disagreement there. But they weren't the first ones to suggest that. Ever since people were smart enough to name things, they probably realized that the Sun and Earth played a role.

    The other celestial bodies? How as astrology ever made a predictive claim about the how they control life on Earth that's every panned out?

  39. Re:astrology by Anonymous Coward · · Score: 0

    You're still making predictions which can be (and have been) tested. You're just starting the process of making it so vague as to be worth no more than talking to someone and letting him or her help you through your introspection. At that point, that isn't astrology (why bother with the stars and planets?), it's just therapy/psychology. And I prefer mine without the mumbo-jumbo and I can get the same results from friends, but at no charge.

  40. Hear that sound?... by thepotoo · · Score: 1
    ...That's the joke doing mach 2 right over your head.

    *ducks*

    --
    Obligatory Soundbite Catchphrase
  41. Let's not forget by p3d0 · · Score: 1

    Jupiter, Saturn, Uranus, Neptune, and of course the Sun.

    --
    Patrick Doyle
    I mod down every jackass who puts his moderation policy in his sig. Oh, wait a sec....
  42. Didn't... by Hangin10 · · Score: 0, Redundant

    that other body have a moon? Xena or somethin' ?

  43. Probe? by Physician · · Score: 0

    Is this anything like the probe placed "inside" Cartman?

    --
    Does God treat us as servants or friends? Check my homepage.
  44. Re:Nice? I am not a professional astronomer, but.. by Razor+Sex · · Score: 5, Informative

    1) The impactor, known alternately as Orpheus or Theia, has been modeled to have been about the size of Mars, and to have hit Earth at a very oblique angle. 2) The absolute best evidence we have for the theory is that the moon has essentially no iron core. All the other terrestrial planets do. As it turns out, the comosition of the moon is remarkably similar to that of Earth's mantle (oxygen/silicon). It is theorized that most of Theia's core merged with our own. Earth's mean density is, if I recall, something on the order of 5500 kg/m^3. The moon has a mean density of something like 3300 kg/m^3. If you were to take out the Earth's iron/nickle core and replace it with mantle material, it would have a mean density similar to that of the moon. 3) As an astronomy minor and having taken planetary formation courses, I've never heard anything about carbonaceous chondrite cores forming the basic building blocks of planets. Carbon, counterintuitively, isn't even too abundant on Earth. Or anywhere else for that matter. Or rather, there certainly is a lot of it, but not compared to oxygen, silicon, iron, aluminum, etc. 4) You can't compare the models of planetary formation in the inner solar system to the outer. Not on a 1:1 basis. The outer planets are significantly larger than the inner because they formed past the frost line (about halfway through the asteroid belt). After this line, ice stays in crystalline form, allowing the rocky starts of the other planets to aggregate much more mass, both planetary and gaseous (the rocky core of Jupiter, at least, is probably about 20 times the size of Earth). With this much more mass, they can more easily capture smaller planetismals, which become moons. It would be far, far easier for a Jupiter to capture Luna than for Earth. 5) As alluded to in the beignning of this post, computer simulations have been done on both the capture and impact theories (including many variations of). The impact theory works. The capture does not. 6) That we have plate tectonics, significant ocean basins, etc, could also be construed as evidence for the giant impact theory. Venus has no moons, and there is little evidence that it ever underwent plate tectonics. The same goes for Mars, and I assume Mercury, though I am not sure on the latter. But the most important thing here is #2. That's the smoking gun.

  45. Re:astrology by einhverfr · · Score: 1

    You're still making predictions which can be (and have been) tested.

    Usually in the sense that "Hmm. Based on these charts, it looks there is a chance that if I approach such and such this way, that I might be able to accomplish such and such." For me astrology is very results-oriented.

    On the other hand, charts contain so much information that occasionally I have missed very disasterous things that made perfect sense in retrospect. For example, there was one woman who I was in love with for a while just after I graduated college. For some reason she always found herself in danger whenever we planned on getting together (yet we talked for hours every night on the phone). It was as if I was a catalyst for seemingly unrelated danger in her life. Explaining why would take more time here than it is worth, but after an ex-boyfriend threatened to kill her she left town and we lost touch (probably for the better). If you take a materialist/scientific approach, I had nothing to do with the misfortunes that befell her (incomplete medical advice regarding prescriptions, angry ex-boyfriends, etc). Yet the birth charts showed clearly that my very presence in her life triggered her danger, and she would trigger patterns of loss for me.

    More recently, I have made one or two very serious predictions which have turned out to be accurate (one involving my wife). Probably the most startling one was when I told a lesbian woman that I thought her progressed chart indicated that she may be experiencing a new interest in men and she told me that she had recently been dating a man who she then found out was married.

    If you are so convinced that there is nothing to it, I would be willing to take an hour or so and write up your chart. You can send the information to chris.travers@gmail.com (I would need the birth date, time off the birth certificate, and place). This way you can judge yourself. This would include just the planets, houses, and aspects. Maybe fixed stars if I feel like it.

    --

    LedgerSMB: Open source Accounting/ERP
  46. Re:Nice? I am not a professional astronomer, but.. by Razor+Sex · · Score: 1

    Sorry, forgot to format it. Hope you guys can follow.

  47. Imperial units! it's an American rocket program! by fantomas · · Score: 1
    "As Wilma rolled though the region on 24 October, fierce 122-kilometer-per-hour winds tore holes in the hangar's 83-meter-tall door and caused minor damage to the rocket inside."

    Can we have this in imperial units, this is an American website and an American space program we're talking about here...

  48. Re:Imperial units! it's an American rocket program by Thumper_SVX · · Score: 1

    Does anyone other than this British guy find this comment deliciously ironic?

  49. Re:astrology by d0tcpp · · Score: 0

    Water was just one instance. there's carbon and hydrogen and oxygen and helium and gold and silver and xenon and - you can include the whole list if you want.

    It's everywhere, all around us. Yes, yes, even the mountains too.

    yes no, anything and everything that exerts some kind of force on us impacts our lives in some way or another, however miniscule.

    Maybe astrologers weren't the first to suggest it, but it's valid none-the-less. The other celestial bodies: astrologers haven't. yet. but one day some punk-a$$ will wake up and say "Oh, NO WONDER we were wrong.. there's this blackhole we forgot to add to our charts that's throwing everything off balance"

  50. Re:astrology by Anonymous Coward · · Score: 0

    Did you know know about the danger your were supposed to present the woman before you got involved, or was it something you found out afterward. If it's the former, why didn't you avoid her in the first place if you have faith in astrology? If the latter, it's not very convincing to predict something after the fact.

    Also, for the bisexual friend, it's not a prediction if she already started dating the guy. It's hard to say what you might have noticed, even unconsciously, about her behavior. That's the trouble with a lot of this sort of thing: most of the evidence that convinces people of the effectiveness occurs under very uncontrolled conditions. When controlled conditions are used, the results turn up null, but that doesn't convince people.

  51. Re:Nice? I am not a professional astronomer, but.. by bskin · · Score: 1

    I'm not an astronomer either, having just taken a couple of courses in college, but my professors seemed to frame the massive impact theory as more 'the best explanation we have for right now.' It had the advantage of explaining things like the size of the moon, the composition, its unusual distance and orbital velocity (which just don't fit for a capture). It's not perfect (especially if the larger solar system creation model doesn't hold up), but it's the only explanation that doesn't have especially glaring holes in it.

    --
    hot foreign sheep.
  52. I don't think we should send a probe to Pluto by WormholeFiend · · Score: 1

    The Mi-Go might find out about us...

    I'm afraid of their brain canisters!

  53. Re:astrology by einhverfr · · Score: 1

    Did you know know about the danger your were supposed to present the woman before you got involved, or was it something you found out afterward. If it's the former, why didn't you avoid her in the first place if you have faith in astrology? If the latter, it's not very convincing to predict something after the fact.

    As I mentioned, it was discovered after the fact, but it provides a link between otherwise unrelated activities. And it was discovered by applying a technique that I was studying at the time-- the problem had to do with fixed stars and their aspects with the planets in each of our charts, and how tendencies towards danger and grief were triggered by eachother's charts.

    Part of the problem with predictions is that astrology does *not* determine events. It doesn't even push them towards some definite conclusion. Instead it provides an abstract map from which many things can manifest. Saying "This will happen to you" is almost never justified IMO regarding astrology even where you have complete information and analysis. This is why I have said that I do not believe that there is any capacity of the scientific method to shed much light on astrology except in debunking the attempts to make it a pseudoscience (which IMO it is not-- it is more along the lines of meditative of spiritual disciplines).

    Science has no more disproved astrology in the sense I practice it than it has disproved the existance of one or more gods. What science has done is trim the domains and assumptions that people use to justify some beliefs. As I have said, I do not believe that it is possible to come up with atomically testable hypotheses regarding astrology because the map is two abstract and too complex. Astrology is as indeterminant with regard to a specific final outcome as the colapse of a single Schoedinger's wave, but has an irreduceable complexity which effectively precludes repeatible testing.

    Furthermore, there is a second untestable assumption behind the older versions of astrology which conflicts with an untestible assumption behind the Scientific method. The scientific method presumes that the tester and phenominon being tested are separate and distinct (at least to a point, though the Copenhagen Interpretation of Quantum physics has been controversial in part because it breaks this assumption*), but Neoplatonism from which the philosophy behind the older astrological tradition formed, assumped that the external and internal worlds were mirrors of eachother, and that changes in one necessarily create changes in the other. In the case of the separation assumption of the scientific method (which is important for the criteria of repeatibility), this assumption is an assumption of convenience. Neoplatonism arrived at their conclusion by a systematic process involving comparing religions (I think they have some assumptions that are problematic, but this is indeed not one of them).

    * Heisenberg in "Physics and Philosophy" interprets the Copenhagen Interpretation in a little bit of a more traditional way. He basically argues that quantum events are effected by all quantum particles in the universe, and that this includes the quantum particles in the observer. In other words, it is not that the wave doesn't collapse in the absense of observation, but rather that without observation, you cannot know how it collapsed. Note however, that the observer as part of the experiment precludes being able to predict individual quantum events with specificity.

    --

    LedgerSMB: Open source Accounting/ERP
  54. Re:Nice? I am not a professional astronomer, but.. by adavies42 · · Score: 1

    Does this mean a return to the theory that the Moon was scraped out of what's now the Pacific basin? IIRC, that was one of the earliest theories for its origin, sometime in the nineteenth century.

    --
    Media that can be recorded and distributed can be recorded and distributed.
    -kfg
  55. Re:astrology by Anonymous Coward · · Score: 0

    I agree that as *you* practice it, astrology is not a pseudo-science as much as a non-science. Although I also suspect that you're very much in a minority among practioners and I also question the wisdom of using the term "astrology" at this point, considering the natural confusion that results.

    I'd say that this puts is back at the question: as I'm interpreting what you're saying, the star charts are not themselves important, they're just a placebo-like medium that lets you sort out your own thoughts. So why bother with them? I'd wager that a decent councilor would be at least as effective, and there's no need hide behind the charts. (Actually, the comparison between the concilor and the astorloger would make a possible test, in this case. Although you'd need a large sample, considering the rather raty nature of the statistics you're bound to get.)

  56. Re:Nice? I am not a professional astronomer, but.. by Polyzinha · · Score: 1

    That's a pretty good summary, but people should know that Mars has two moons. However, they're not nearly as big as Earth's moon and are probably captured asteroids, not the result of a giant impact, so they don't invalidate this theory.

  57. Re:Nice? I am not a professional astronomer, but.. by Tragamor · · Score: 1

    I also am not an astronomer, so this may be a dumb question, but how do you get an axis tilt of 177.36 degrees? Surely this is a tilt of 12.64 degrees. So do you use the magnetic poles as the reference; but in that case, when Earth switchs it's magnetic field, will all these axis tilts then be incorrect, or what if the other planets also have magnetic fields which switch?
    The other alternative I see is on direction of rotation, but if that is the case, Venus also has an equator near the elliptic - just spinning in the opposite direction to us.

    --
    To be is to do - Descartes. To do is to be - Sartre. Dooby dooby do - Frank Sinatra.
  58. Re:astrology by einhverfr · · Score: 1

    Actually, as I was thinking about it, there might be some testable hypotheses in Astrology, but not along the lines of "this sign correlates with ..." because the charts are too complex for that (besides the moon and rising signs and relavent houses mean that one is likely to have a very good chance that individuals in the control group could have more influence from a given sign/house than those in the experimental group). I would liken this to a double blind study where over half of the people in the control group are given the medicine instead of a placebo.

    Here are some hypotheses that might be worth taking a look at. Not sure how many of them would turn out:

    1) It might be interesting to do statistical analysis on the number of hard (square, opposition) aspects and soft (trine, sextile) and the relative success of individuals in a number of areas (career, education, general sense of happiness). My guess is that counterintuitively, at the high end of the hard aspect ratios, people might be frustrated, while at the high end of soft/harmonious aspects, people might be lazy and unaccomplished.

    2) It might be interesting to do a survey of 12th house/Pisces activity and people in the prison system. Unfortunately this analysis would be very complex as well and would probably need to be done in the following way:
    Collect an experimental and control sample. Hand them to an astrologer. Have the astrologer rate the 12th house activity on a scale of 1 to 100. May require a compond scale: 12th house bodies, 12th house/ascendant interactions, house rulers, etc.
    Do the statistical analysis.

    --

    LedgerSMB: Open source Accounting/ERP
  59. Science by Washii · · Score: 1

    Not that the LANGUAGE of science uses kilometers, meters and all that wonderful other metric stuff, right? Why do you think all basic science classes in US public education forces us to learn all those conversions from MM to CM to meters and beyond? Or was my boondocks of a school district just that far ahead?

    I'm an American. Big deal if they use something other than Imperial measurements, scientists use metric (and the US should use metric for so many reasons, anyway). Go use Google, something of a query like "122KM to MPH" or "83M to FT"