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CatKnight 
Jedi Republican
Group: Members
Posts: 3807
Joined: Dec. 2000
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Posted on: Feb. 28 2001,02:19 |
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quote:
Originally posted by hair:
The existence of a black hole is really only a theory as of yet, but the theoretical black hole is just a massive amount of gravity that sucks anything and everything into it (nearby planets, stars, even light itself). So a person would be crushed before they even got close enough to "enter" it...
black holes have been proven to exist. although they have not been directly observed (which would be very difficult if not impossible), we can observe their effects. if we see 1 star orbiting around something else we can't see, we can determine the mass of the unknown object by the way the regular star orbits. several objects have been found to have masses larger then the chandrasekhar limit. the best blach hole candidte is Cyg X-1. a black hole is not just a 'massive amount of gravity', it is the core of a collapsed star whos mass is so large that light is curved so much that it just curves into itself, and can't escape (the event horizon). einstein's theory of relativity was proven by looking at the sun during an eclipse and observing a slight curvature of space right around the sun (stars right near the sun appeared to bend inwards). a black hole is the same thing but much stronger. quote:
What would you see if you went right up to a black hole? Above are two computer generated images highlighting how strange things would look. On the left is a normal star field containing the constellation Orion. Notice the three stars of nearly equal brightness that make up Orion's Belt. On the right is the same star field but this time with a black hole superposed in the center of the frame. The black hole has such strong gravity that light is noticeably bent towards it - causing some very unusual visual distortions. In the distorted frame, every star in the normal frame has at least two bright images - one on each side of the black hole. In fact, near the black hole, you can see the whole sky - light from every direction is bent around and comes back to you. Black holes are thought to be the densest state of matter, and there is indirect evidence for their presence in stellar binary systems and the centers of globular clusters, galaxies, and quasars. 
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