What happens to the core of a massive star that exceeds the limit for Neutron Degeneracy Pressure?
Answer
It collapses indefinitely into a singularity
When the mass of the collapsing stellar core surpasses the upper limit capable of being supported by neutron degeneracy pressure—often cited as around 3 solar masses—there is no known physical force powerful enough in the universe to counteract the immense gravitational pull. Consequently, the collapse proceeds without hindrance. The matter is squeezed down indefinitely, shrinking to a point theorized to have infinite density and zero volume, which is termed a singularity. This process creates the gravitational well defined by the event horizon, resulting in the formation of a Black Hole, representing the ultimate triumph of gravity over all known forms of quantum pressure.

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