What is a black hole?

If the small star consists of a substance of very high density, it can begin to compress under the action of its own gravity. Moreover, compressing, it becomes even denser, and its gravity is even stronger. Until the star is transformed into an infinitely small object, which is called the material point. Its gravitational attraction is so great that the substance fails in it, as in the funnel. This hole absorbs everything that lies within the reach of its mighty gravity, at the same time the light, so it is called "black".

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