What comes after the red supergiant stage?

After the red supergiant stage, a massive star will typically undergo a supernova explosion. This occurs when the star's core collapses, leading to a rapid expulsion of its outer layers. The remnant core may become a neutron star or, if the mass is sufficient, collapse further into a black hole. The supernova explosion also disperses heavy elements into space, contributing to the formation of new stars and planets.