Questions regarding points of extremely high mass density, which creates an extremely strong gravitational field from which light cannot escape.

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22
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5answers
289 views

How are black holes found?

Black holes have so much gravity that even light can't escape from them. If we can't see them, and the suck up all electromagnetic radiation, then how can we find them?
16
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3answers
257 views

Why can't light escape from a black hole?

I've heard that light can't escape from a black hole. Can it? If not, why?