Lesson Five : How Do Neutron Stars Form?Neutron stars result from the death of massive stars, which are around 8-15 times more massive than our Sun. When a massive star collapses and explodes in a tremendous supernova explosion, the dense inner core is all that remains.
When the dying star is collapsing, the core gets progressively denser. Eventually, the elementary particles in the core (protons and electrons) cannot withstand the force of gravity, and they fuse together to form neutron. Eventually, all of the material in the core is converted into neutrons and the origin of the object's name becomes obvious.