If the core of a supernova explosion contains three or more solar masses of matter, it will most likely become a black hole.

Here's why:

* Gravity's Triumph: The immense gravity of such a massive core is so strong that it overwhelms all other forces, even the outward pressure of neutrons.

* Event Horizon: The core collapses to a point of infinite density, creating a singularity. Around this singularity, a region called the event horizon forms, where the escape velocity exceeds the speed of light. Nothing, not even light, can escape from within the event horizon.

* Black Hole Formation: The region within the event horizon is what we call a black hole.

While neutron stars can also form from supernovae, they typically occur when the core mass is between 1.5 and 3 solar masses.