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What is Black hole?

A black hole is a concentration of mass great enough that the force of gravity prevents anything from escaping it except through quantum tunneling behavior (known as Hawking Radiation). 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.

A (simulated) Black Hole of ten solar masses as seen from a distance of 600km with the Milky Way in the background (horizontal camera opening angle: 90°).

A (simulated) Black Hole of ten solar masses as seen from a distance of 600km with the Milky Way in the background (horizontal camera opening angle: 90°).
 

All text of this article available under the terms of the GNU Free Documentation License (see Copyrights for details).

 

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Submitted By:joseph
Date: 7/11/2007
how does the the black hole stay black and if someone went inside the back hole would it kuill them?



 
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