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The Schwarzschild radius theory could be wrong as the mass can't be compressed that contradicts the laws of physics as the internal force inside the atom wouldn't allow it, there will be a nuclear fusion and energy. But when the star collapses two different things happen: a gravitational wave pulling the surrounding matter due to the vacuum happened and at the same time the emission of the remaining gasses from the collapsed star escaping from the center of the black hole making a 90 degrees angle in the form of a jet. And here we see the matter ejected from the center and don’t form a high density sphere as the Schwarzschild theory imagine, there is no matter left in the center. Source: https://www.space.com/baby-black-holes-misbehaving-experts-perplexed