can a person ever come near a black hole?
539666
People die at a certain level of gravity. The gravity of a black hole would way exceed this level. a person would DIE if they tried to land on JUPITER, the gravity would be so much that they wouldn't be able to move to expand they're chests to breath, they'd be so heavy.
520554
Small black holes disappear in a puff of Hawking radiation, pretty rapidly.\n\nThey don't really need containment. They just evapourate into thermal radiation.  It's only the dirty great big ones that could smash the place up.  Making one of these on earth is just not feasible.  The ones that occur naturally in the universe are rather a long way off.\n\nNothing to worry about.
857627
The black hole will have the same gravitational force on distant objects.  The event horizon is where light cannot escape.  The distance of the event horizon is approximately 2 km (1.24 miles) for every solar mass.  So it would have to have a lot of solar mass to engulf things around it.
277679
About as long as black holes have been theoretically suggested.
846625
This theory is formulated by lot of laws and was given by a theory of relativity in which Albert Einstein says that if two things travel in opposite direction with or greater than the speed of light you could look into the future..\nbut it sounds to be impossible ...\nwhile some scientists say that if a object goes near a black hole and a small torque is given to that it starts rotating at a speed nearly equal to light...\n           you can refer theory of relativity for more answers...
432010
a black hole is a region of spacetime from which nothing can escape because of gravity, and yes, they exist.  this was not a very detailed answer, but i may write more later.  you can follow the link below.\n\nhttp://en.wikipedia.org/wiki/Black_hole
525444
The Black holes have so much gravity that they can suck up the planets with no power at all. You can imagin by this that not even light can escape through them. Black holes could be 3-D. \nSome Scientist thinks that the black holes can be used for travelling to other galaxies. We can travel through the Black holes at the speed of light to other galaxies within a very less time.
473814
General relativity (as well as most other metric theories of gravity) not only says that black holes can exist, but in fact predicts that they will be formed in nature whenever a sufficient amount of mass gets packed in a given region of space, through a process called gravitational collapse. For example, if you compressed the Sun to a radius of three kilometers, about four millionths of its present size, it would become a black hole. As the mass inside the given region of space increases, its gravity becomes stronger — or, in the language of relativity, the space around it becomes increasingly deformed. Eventually gravity gets so strong that nothing can escape, an event horizon is formed, and matter and energy must inevitably collapse into a singularity.
737411
Studying black holes would be good if you're a graduate student at MIT but since you don't say what level you're at, it's really hard to answer your question.
318465
No, because if that were the case, none of us would be alive to talk about it.  Inside a black hole, the force of gravity is so strong, that nothing, not even light, can escape.  Once sucked in (to the black hole), there would be a time period of about eight seconds to travel from the outer regions of the black hole, to the singularity (black dot in the middle).  However, that time period is based upon our interpretation of time.  We see time as merely a basis on something else (the sun gives us a 24 hour day, the earth's rotation around the sun gives us our calendar year, etc).  This can get really complicated, so in a nutshell, if we were in a black hole, we would be moving at the speed of light, which is much quicker than the pace at which humans live.  That being said, when entering a black hole, time itself would actually speed up.  Once the singularity is reached, we would be crushed to an unbelievable density, making it impossible to live.  So to answer your question, we are not living in a black hole, although there is evidence of their existence in our universe.
24829
Although black holes are not directly detectable, there is much indirect evidence of their existance such as the movement of other objects.\n\nGravity is not a simple phenomenon and cannot "escape" from anything. It is a property of space-time itself.
19986
you get a black hole.
244271
Wormholes can probably exist and are around us all the time.  The only problem is that they are very, very, very small.  They exist only on a quantum level, and could theoretically be seen if you could look a things on a quantum level.  If you could look look at things on this level then you would observe what is called "quantum foam".  It is in this that you would see wormholes.  One problem though, is that these wormholes, once they appear, would close up and disappear again very quickly.  \n\nAgain, theoretically, you could hold one of these open, IF you had a strong and dense enough material.  But this material would have to be more dense than anything that anyone knows about.\n\nJust as a side note - blackholes cannot be wormholes.  Blackholes are a different phenomena to wormholes.  A wormhole is a traversable bridge between two areas of space.  A blackhole is a supermassive star that has collapsed back in on itself, creating so much gravity that not even light can escape.  Plus, the singularity of the blackhole is protected by an "event-horizon", which if anything fell it will be lost forever.
661081
A black hole is a concentration of mass great enough that the force of gravity prevents anything past its event horizon from escaping it except through quantum tunnelling behaviour (known as Hawking Radiation). The gravitational field is so strong that the escape velocity past its event horizon exceeds the speed of light. This implies that nothing, not even light, inside the event horizon can escape its gravity. It is, however, theorized that wormholes can provide an exit path for energy or matter. 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.
486631
Assuming this is possible the end positioned inside the event horizon would be broken down into it's individual atoms and would cease to exist.  However some scientists (me being one of them) think black holes are only one end of a worm hole and that when you reach the event horizon you are expelled out of a white hole into another universe.  Think of a white hole as the polar opposite of a black hole, instead of consuming every thing it expels everything
403857
yes, black holes really exit.\n\nhttp://en.wikipedia.org/wiki/Black_hole
985600
No, you won't get stuck when you reach the speed of light because according to you, time is still moving forward normally. It is people on Earth (who are not moving very fast compared to you) who sees you moving slower and slower until time stops for you when you reach the speed of light.\n\nYour theory about the nature Blackholes is quite plausible, but no one really knows at this point what will happen when the Universe come into an end, and if the Universe will begin again with a Big Bang from the blackhole explosion.