Question

How to explain black hole?

Answer 1

A black hole is a place in space where gravity pulls so much that even light can not get out. The gravity is so strong because matter has been squeezed into a tiny space. This can happen when a star is dying. Because no light can get out, people can't see black holes. They are invisible.

Answer 2

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Explanation:

Black holes are volumes of space where gravity is extreme enough to prevent the escape of even the fastest moving particles.