What is black hole?
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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.
A black hole is a region in space where gravity is so strong that nothing, not even light, can escape from it once it has crossed a boundary called the event horizon. Black holes form when massive stars collapse under their own gravity at the end of their life cycle.
A black hole is a region in space where gravity is so strong that nothing, not even light, can escape from it. It forms when a massive star collapses under its own gravity at the end of its life cycle.