Furthur, as a black hole, the Sun would continue to emit radiation, called Hawking radiation. This would continuously drop the mass of the black hole Sun. As the mass of the black hole decreases, so does the level of radiation.
This is the evaporation spoke of in the article. Since their black hole is only 2 particles in mass, it's not a long process.
Remember that the gravity is proposed to be this Extra-Ordinarily intense only at these "quantum distances". The point was -- you can make the black hole with almost no matter whatsoever, if you can get the particles to play nice at these infinitesimally small quantum distances.
Fast forward a few years, scientists make a black hole. Why doesnt it destroy the earth?
1) The black hole weighs no more than the particles slammed together to make it. It has essentially zero pull on anything. A grain of salt would make an incredibly more effective attractor.
So you say, yes, but the black hole will persist and continue to grow in mass by swallowing more and more particles.
But the scientists in the Times article say the black hole will "evaporate".
The following paragraph, from this page, states it well:
Since the 1970s, it has been known that black holes are not completely black. In fact, they emit very low-energy radiation called Hawking radiation. The lower the mass of a black hole, the higher the energy of the emitted Hawking radiation. As a black hole radiates, its mass decreases, and it starts emitting more and more radiation, causing it to evaporate more and more rapidly. Eventually, it shrinks to around the Planck mass, the point at which its DeBroglie wavelength is equal to the Schwarzschild radius. At this point, we no longer know what happens, since to describe physics at the Planck scale requires a theory of quantum gravity.
I guarentee it, sonny. That thing is dense. Reeeeally damned dense. It's downright doubly damned dense. I bet billions of pounds of gas and dust are probably being sucked past it's event horizon for every character I write. You should never play down a black hole sitting at the middle of a galaxy 100,000 light years across with possibly 1 trillion stars in it.
Probably though it is not as dense as someone who assumes a black hole isn't.
Nothing is seen past the event horizon of a black hole. Beyond that, there are great masses of rotating gasses becoming enormously compressed orbiting their way around and falling in towards the black hole. These massively compressed gasses, dust, etc. get so incredibly hot that unfathomable amounts of energy are released well outside the event horizon. This energy can escape and be seen.
Yeah, that would rock, except for the fact that you'd need to travel at least 360,000 miles per hour to pull it off. Unfortunately that would ablate/vaporize your entire aircraft/rocket and all organic matter.
That sounds like a crapload of eggs in one basket. Talk about a single point of damage, or earthquake related stresses, etc, causing millions and millions in damage.
Precision mirrors are hugely expensive. For perspective, look at amatuer Dobsonian Scopes for instance. For $2895.00 you can get a nice 12" scope, about $2000+ of that pays for the mirror.
Observatories with compound telescopes, with many "small" mirrors, probably make their owners sleep a lot better when they think about some telescope-tech shattering just one section by accident.
Super expensive, since the dark side of the moon is constantly rotating around the moon. You would need a railway system which was circum-lunar, and then you would drive the telescope around the moon every 28.xx days.
During New Moons, the telescope would be facing Earth.
There is no "dark" side of the moon that stays dark. There is a "far" side of the moon that never faces Earth, but it can no more be considered dark than any other part of the moon.
Funny that the dilr0d programmed the worm to attack an IP address instead of a DNS name. I hear this months release, CodeRED 2.0, is going to go after the entire 10.0.0.0 network.
The surface pressure on Mars varies seasonally, because about 20% of the carbon dioxide in the atmosphere freezes out at the poles in winter. Although the amount of water vapor is very low (0.03%), it is actually close to saturation for the thin, cold Martian atmosphere--thus the atmosphere of Mars is actually very wet. In terms of relative humidity, it is even wetter than that of Earth!
Compared to Earth, the atmosphere of Mars is very thin. On Earth the average pressure exerted by the atmosphere on its surface is 1,013 millibars (mbar), but on Mars the average surface pressure is only 8 mbar, less than one hundredth that of Earth. The atmosphere of Earth is predominately nitrogen (78.1%) followed in abundance by oxygen (20.9%), which is due to the activity of photosynthetic organisms such as algae and plants. Earth's level of carbon dioxide is so low (0.035%) that some algae and plants are limited by their ability to obtain it for photosynthesis. In contrast, the Martian atmosphere is largely carbon dioxide (95.32%), followed in abundance by nitrogen (2.7%), argon (1.6%), and oxygen (0.13%).
The CNN article says "Baalke said the possible size of the meteor "depends on the composition of the meteor and the speed it was traveling. It could have been as small as a baseball " and would have been traveling between 100 mph and 200 mph."
This sounds insanely wrong to me. I dont think any unpowered object travelling 100 - 200 mph could possibly fly across Canada and land in Pennsylvania.
Have you ever heard of meteroids travelling at such rediculously low speeds? No chance of sonic booms.
The huge crater in Arizona, for example, was thought to be made by a 85 foot diameter chunk of iron travelling 45,000 miles per hour.
NASA should be pimping the hell out of it. The existence of extraterrestrial life, even microbes, is a question of enormous magnitude. It is truly a question of biblical proportions. NASA's work on Mars could perhaps unravel one of the greatest mystery humans face. It will be very interesting to discover what is returned to Earth in the Mars soil samples returning to Earth in 2005. You can check out the strategy paper NASA issued on researching Mars exobiology.
I love it, first you can watch Willy the Whale do his jumping show, then tour the aquariums, and then check out the world-class data center.
Other amusement parks besides Sealand should do this too! The Six Flags company, already has distributed locations, they could easily make Six Flags regional data centers.
And Disneyworld, already has the makings of Disney-East and Disney-West!
People talk about using the WHOIS records to figure out who spammers are. My WHOIS records on my domains have led to me BEING spammed than any other avenue out there.
They have also led a person at one time to think he was funny be publishing all my personal info in an online debate on a Star Trek Voyager newsgroup. (Which happened to be a nutty place!)
Personally, I'd like personal information OFF the Whois. Otherwise, get a separate PO BOX and other separate identity to publish on your domain records.
Dont forget the geniuises who buy a $million dollar computer$ Vax setup and then forget to change the stock sysAdmin password. Thats another kind of password idiot altogether -- the default password idiot.
We used this technique to enter our local (huge) school districts Vax setup, authorize our own accounts and play for a few weeks.
In the end, the members of our hacking troop who were over 18 years enjoyed an entirely different conclusion to the fun than the two of us who were juveniles.
Slashdot Mirror
You are correct.
Furthur, as a black hole, the Sun would continue to emit radiation, called Hawking radiation. This would continuously drop the mass of the black hole Sun. As the mass of the black hole decreases, so does the level of radiation.
This is the evaporation spoke of in the article. Since their black hole is only 2 particles in mass, it's not a long process.
Fast forward a few years, scientists make a black hole. Why doesnt it destroy the earth?
1) The black hole weighs no more than the particles slammed together to make it. It has essentially zero pull on anything. A grain of salt would make an incredibly more effective attractor.
So you say, yes, but the black hole will persist and continue to grow in mass by swallowing more and more particles.
But the scientists in the Times article say the black hole will "evaporate".
The following paragraph, from this page, states it well:
Since the 1970s, it has been known that black holes are not completely black. In fact, they emit very low-energy radiation called Hawking radiation. The lower the mass of a black hole, the higher the energy of the emitted Hawking radiation. As a black hole radiates, its mass decreases, and it starts emitting more and more radiation, causing it to evaporate more and more rapidly. Eventually, it shrinks to around the Planck mass, the point at which its DeBroglie wavelength is equal to the Schwarzschild radius. At this point, we no longer know what happens, since to describe physics at the Planck scale requires a theory of quantum gravity.
No kidding....! Except, you would see him coming from a mile away with that 26 mile diameter concrete supercollider headgear.
http://www.cnn.com/2001/US/09/12/seismic.impact/
t c. html
http://www.ldeo.columbia.edu/LCSN/Eq/20010911_w
> particuarly big.
I guarentee it, sonny. That thing is dense. Reeeeally damned dense. It's downright doubly damned dense. I bet billions of pounds of gas and dust are probably being sucked past it's event horizon for every character I write. You should never play down a black hole sitting at the middle of a galaxy 100,000 light years across with possibly 1 trillion stars in it.
Probably though it is not as dense as someone who assumes a black hole isn't.
Nothing is seen past the event horizon of a black hole. Beyond that, there are great masses of rotating gasses becoming enormously compressed orbiting their way around and falling in towards the black hole. These massively compressed gasses, dust, etc. get so incredibly hot that unfathomable amounts of energy are released well outside the event horizon. This energy can escape and be seen.
this sounds exactly like AIDS, or hepatitis, kidney failure and cancer
The primary application of this type of imaging is immediately obvious to any seasoned slashdotter.
and the lasers are projecting holographic dogs with bees in their mouths!! and the sharks kind of swimdance to a funky fat beat!
Yeah, that would rock, except for the fact that you'd need to travel at least 360,000 miles per hour to pull it off. Unfortunately that would ablate/vaporize your entire aircraft/rocket and all organic matter.
Precision mirrors are hugely expensive. For perspective, look at amatuer Dobsonian Scopes for instance. For $2895.00 you can get a nice 12" scope, about $2000+ of that pays for the mirror.
Observatories with compound telescopes, with many "small" mirrors, probably make their owners sleep a lot better when they think about some telescope-tech shattering just one section by accident.
The star Betelgeuse, which is the North-East bright red star in the familiar constellation Orion, is so large that it's atmosphere has been imaged.
Betelgeuse - An outrageously big star imaged by Hubble
Super expensive, since the dark side of the moon is constantly rotating around the moon. You would need a railway system which was circum-lunar, and then you would drive the telescope around the moon every 28.xx days. During New Moons, the telescope would be facing Earth. There is no "dark" side of the moon that stays dark. There is a "far" side of the moon that never faces Earth, but it can no more be considered dark than any other part of the moon.
Funny that the dilr0d programmed the worm to attack an IP address instead of a DNS name. I hear this months release, CodeRED 2.0, is going to go after the entire 10.0.0.0 network.
Awesome. I look forward to Fox's "Nurse Wars". Twenty nurses enter, only one leaves!
Compared to Earth, the atmosphere of Mars is very thin. On Earth the average pressure exerted by the atmosphere on its surface is 1,013 millibars (mbar), but on Mars the average surface pressure is only 8 mbar, less than one hundredth that of Earth. The atmosphere of Earth is predominately nitrogen (78.1%) followed in abundance by oxygen (20.9%), which is due to the activity of photosynthetic organisms such as algae and plants. Earth's level of carbon dioxide is so low (0.035%) that some algae and plants are limited by their ability to obtain it for photosynthesis. In contrast, the Martian atmosphere is largely carbon dioxide (95.32%), followed in abundance by nitrogen (2.7%), argon (1.6%), and oxygen (0.13%).
Kevlar's post should get the mod points. He's right. The parent post is inaccurate. Almost all extra-solar planets found and researched so far are between 32 - 150 light years from here. In contrast, just our Galaxy is thought to be 100,000 light years across.
This sounds insanely wrong to me. I dont think any unpowered object travelling 100 - 200 mph could possibly fly across Canada and land in Pennsylvania.
Have you ever heard of meteroids travelling at such rediculously low speeds? No chance of sonic booms.
The huge crater in Arizona, for example, was thought to be made by a 85 foot diameter chunk of iron travelling 45,000 miles per hour.
Look at all the Mars stuff happening - Mars in the Media, and the immediately recent Mars opposition and new hubble shots, the killer success of the surveyor mission, the probes heading there right now, the rover mission and others.
NASA should be pimping the hell out of it. The existence of extraterrestrial life, even microbes, is a question of enormous magnitude. It is truly a question of biblical proportions. NASA's work on Mars could perhaps unravel one of the greatest mystery humans face. It will be very interesting to discover what is returned to Earth in the Mars soil samples returning to Earth in 2005. You can check out the strategy paper NASA issued on researching Mars exobiology.
The ultimate mystery!
Other amusement parks besides Sealand should do this too! The Six Flags company, already has distributed locations, they could easily make Six Flags regional data centers.
And Disneyworld, already has the makings of Disney-East and Disney-West!
Way to go, Sealand!
They have also led a person at one time to think he was funny be publishing all my personal info in an online debate on a Star Trek Voyager newsgroup. (Which happened to be a nutty place!)
Personally, I'd like personal information OFF the Whois. Otherwise, get a separate PO BOX and other separate identity to publish on your domain records.
"Perhaps we can get another provider's fiber feed, laid 100ft apart from the first!"...
"No, I say we build a complete second redundant data center! Over there!" (Guy points to other side of platform.)
No, no, instead, how about an actual rotating centrifuge for gravity experiments? One Spinning Chamber, Please
STARBUCK..
Yeah Paw?
You an Hoss get on down to that there planet and russle us up some vittles for our warp drive. I can hear her belly grumblin!
Dont forget the geniuises who buy a $million dollar computer$ Vax setup and then forget to change the stock sysAdmin password. Thats another kind of password idiot altogether -- the default password idiot.
We used this technique to enter our local (huge) school districts Vax setup, authorize our own accounts and play for a few weeks.
In the end, the members of our hacking troop who were over 18 years enjoyed an entirely different conclusion to the fun than the two of us who were juveniles.