* Neutron star: If the core's mass is between 1.4 and 3 solar masses, it will collapse further under its own gravity, squeezing protons and electrons together to form neutrons. This incredibly dense object is called a neutron star.
* Black hole: If the core's mass is greater than 3 solar masses, even the intense pressure of neutron degeneracy can't resist the gravitational collapse. The core continues to shrink until it becomes a point of infinite density, known as a singularity, surrounded by an event horizon, forming a black hole.
So, the final fate of the stellar core depends on its mass.