Sihai network

How do black holes form

The black hole is composed of a singular point in the center where the scalar polynomial constructed from the Riemannian curvature tensor tends to diverge and the surrounding space-time. Its boundary is a unidirectional membrane that can only enter and exit: the event horizon, which is invisible within the range of the event horizon.

According to Einstein's general theory of relativity, when a dying star collapses, it will collapse to the center and become a black hole, swallowing all light and any matter in the adjacent universe.

In the case of a black hole, because the mass of the stellar core is so large that the contraction process continues endlessly, even the repulsive force between neutrons can not be stopped. The neutron itself is crushed into powder under the attraction of squeezing gravity itself, and the rest is a matter with unimaginable density. Due to the gravity generated by high mass, any object close to it will be absorbed by it. (HeiDongShiZenMeXingChengDe)