How deep is your BLACK HOLE knowledge?
439347
why is people arrogant if u can't explain yourself???... the only arrogant here is YOU... if you want some wisdom start being humble... you can't learn from others if u think u already know everything...
971309
The best way to know that you've moved inside the event horizon of a black hole is by finding that you can no longer communicate with the rest of the universe. For instance, if you were in a probe launched by a nearby mother ship and passed inside the event horizon, all radio contact with the mother ship would be totally lost because nothing can escape from inside the event horizon.
285104
The radius of the event horizon of a black hole is called the "Schwarzschild radius".\n\nTo calculate the Schwarzschild radius,\nr = 2Gm/c^2\nwhere r is the radius, G is the Universal Gravitaional constant (6.67 E-11), and c is the speed of light in a vacuum (299,792,458 m/s).\n\nThe Earth has a mass of about 5.9742 E24 kg, so plugging into the equation tells us that if the Earth were compressed into a black hole, its event horizon would be at a radius of away .00887 m (8.87 mm) from the singularity.
195816
actually scientist have a lot of theoretical knowledge of black holes. \n\nYou would fall until you were at the center(in a finite amount of time from your frame of reference), at which point you would be compressed almost to nothing. An outside observer would still be able to see you though for a while and things would appear stretched.  try wikipedia's entry on black holes. http://answers.com/black_hole\n\nRepeat? Where's the original?
794668
Well, black holes are mysterious simply because they are regions where light itself cannot escape!  If you go by general relativity black holes are singularities where space and time lose their meaning in the rational sense!  As for black holes leading to some location, most likely that is not the case.  Such an object is a wormhole, which is a theoretical solution to Einstein's field equations like black holes are.  But, wormholes have not been observed in nature and they are unstable to the point where if even a tiny amount of mass enters the wormhole it will collapse it and destroy the matter before it ever gets to the other side!  So, that being true a black hole has no opening somewhere else, because if it did it would collapse the same way.  However, Stephen Hawking showed that black holes do dissipate over many billions of years because of quantum tunneling.  Turns out some matter/energy actually gets out of the black hole!  So, we still have alot to learn about the nature of black holes, because we still have to learn alot about gravity!
120266
i do not think that they are discovered bu it is known that black holes themselves emmit matter at a small rate (thats why very small black holes cannot exist for long)
1095953
There are no black holes close enough for a terrestrial probe to reach them yet. According to current theory, the intense gravitational field would trap any electromagnetic signal the probe might be sending out after it crossed the event horizon, so we wouldn't know what happened in any event.
924845
Interesting.  Since muons, even at near-light speed, are likely to decay before hitting Earth-local detectors, it seems difficult to believe that any have been detected.  At least I've seen no articles on muon radiation from black holes in the major science publications.\n\nAlso, if you were indeed a walking black hole, the circumference of your event horizon would probably be comparable to the size of a proton or maybe smaller.  In which case, you wouldn't really be walking or typing or reading this answer.  <sigh>.\n\nAnd we even shouldn't go anywhere near considering the effects of stellar-equivalent energy flux around your navel.  Does the term "massively extra crispy" begin to communicate the state of your body not to mention your surrounding area for miles?  Thought so.
748844
According to Stephen Hawking, black holes are real and I believe that the Hubble telescope has found some way off in space.  Read Hawking's books and he explains them in a very straight forward, every man can understand style.
899210
Currently nobody really knows. Einstein's general theory of relativity tells what the gravity from a black hole is, but it doesn't tell anything about what is inside it. The only thing which is known for sure is that an object collapses to a black hole if it reaches a certain density. In the universe that happens for stars with sufficiently high masses. They consist of a lot of particles, but what happens to them after the star has collapsed to a black hole is simply unknown. Part of the problem is that it lies in the nature of the black hole that no signal can escape from it (not even light) so it is extremely difficult to get any information of what's inside a black hole (some quantities can be determined though: A black hole has a well defined mass which can be measured because of its gravitation). A comprehensive theory for what happens to a star when it collapses to a black hole would at least have to incorporate Einstein's theory as well as quantum mechanics and to date such a successful unified theory of that kind hasn't been achieved (although there are some proposals and vague ideas, you have probably heard about superstring for instance).
378723
The closer you get to a black hole, the greater the gravity gradient gets.  That is, the force of gravity is much stronger near the black hole than far away.\n\nAs you fell into the BH, the difference between the force of gravity at your feet and your head would become so great that your body would be ripped in two.  Then as the two pieces of you fell closer to the hole, the gravity gradient would increase still more, and the two pieces would be ripped into four.  This would continue until, by the time you reached the event horizon, you would be ripped into countless tiny pieces.  \n\nThe little pieces of you would fall through the event horizon, then continue falling and ripping into smaller pieces until they reached the singularity at the center of the BH.  No one knows what would happen then, because a sinuglarity does not obey the laws of physics that we know; gravity and density are infinite there.
1049362
yes i do.  it begs the question...so where is the edge of the universe...and what does it look like?  is it moving further outward or just hanging out like a big wall?  very deep.
692417
Do calculations include black matter?
724210
something like what we call a "black hole"
51985
We can view quite a distance away (measured in light years) from our own solar system using the latest generation of telescopes and probes but we have not even yet begun to exit from our own solar system. Even the distance needed to escape our own galaxy, the Milky Way, is beyond our capability as of yet. We do not even know most of the fundamental questions pertaining the formation and existance of the galaxy such as dark matter. Our knowledge of the outer solar system stems from mostly interpretations of photos sent back by probes such as Voyager and the Hubble Telescope as well as the never generation of scanning tools but that is all for now. Other phenomenons we can speculate and conjecture using maths such as the existance of black holes. Maybe one day we may venture farther away but with problems even for a manned flight reaching Mars, that time will be long away indeed and it may never be possible to ever reach the outer limit of what we know as space for it is light years away and even now conjecture is whether there really is an outer limit to our universe as it is still expanding. As for other galaxies there are many abound ours is only one of millions, there are examples like the Crab Nebula etc.
696294
Not believed to max out as you say.  The diameter of the event horizon will keep expanding as new material is drawn in.  Stellar black holes are believed to be only a few miles across, while super-massive black holes comparable to the size of the solar system are believed to exist at the centers of some galaxies.
387898
Black holes are food for my brain and curiosity. I love the subject it is so interesting!\nBackround info: A black hole is a concentration of mass great enough that the force of gravity prevents anything from escaping from it except through quantum tunneling behavior. The gravitational field is so strong that the escape velocity near it exceeds the speed of light. This implies that nothing, not even light, can escape its gravity, hence the word "black." The term "black hole" is widespread, even though it does not refer to a hole in the usual sense, but rather a region of space from which nothing can return. Theoretically, black holes can have any size, from microscopic to near the size of the observable universe.\nBlack holes are predicted by general relativity. According to classical general relativity, neither matter nor information can flow from the interior of a black hole to an outside observer. For example, one cannot bring out any of its mass, or receive a reflection back by shining a light source such as a flashlight, or retrieve any information about the material that has entered the black hole. Quantum mechanical effects may allow matter and energy to radiate from black holes; however, it is thought that the nature of the radiation does not depend on what has fallen into the black hole in the past.\n\nThe existence of black holes in the universe is well supported by astronomical observation, particularly from studying supernovae and X-ray emissions from active galactic nuclei.\nMy answer 1)time travel when you, or in this case an object, goes fast the world goes slow. and if something, a black hole, is going, or sucking, fast enough, the world around you will eventually begin to reverse.