Question

what do you mean by Black hole

Answer 1

black hole is like a dustbin in milky way galaxy
all things that passes through then lost

Answer 2

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.