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
299 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
261 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?
7
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5answers
141 views

Orbiting around a black hole

Is it possible (for either a satellite or a planet) to orbit around a black hole? Do they attract everything around themselves into the center? Or they just affect gravitational force just like stars? ...