When a medium-size star runs out of fuel (hydrogen to fuse into helium), it will collapse on itself. It has a large enough mass that it can push past the resistance from electron degeneracy pressure....
A neutron star is a type of stellar remnant that results from the gravitational collapse of a massive star during a supernova. Such stars are composed almost entirely of neutrons, which are subatomic...
Yes. The more massive the star, the faster if develops - and the faster it grows old and dies. A very massive star will die in a supernova explosion, which may result in a neutron star or a black...