A dead star is typically referred to as a "white dwarf," "neutron star," or "black hole," depending on its mass and the stage of its life cycle after it has exhausted its nuclear fuel.

White Dwarf: This is the final stage for stars that are not massive enough to become neutron stars or black holes. When these stars have exhausted their nuclear fuel, they shed their outer layers and leave behind a hot core that no longer undergoes fusion. This core, the white dwarf, will eventually cool and fade over time.

Neutron Star: If the original star was more massive, it can undergo a supernova explosion, leaving behind an incredibly dense core known as a neutron star. Neutron stars are the densest and smallest stars known to exist, composed almost entirely of neutrons.

Black Hole: For stars with an even greater mass, the gravitational collapse after a supernova is so intense that it forms a black hole. A black hole is a region of spacetime where gravity is so strong that nothing, not even light, can escape from it.

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A white dwarf is a stellar remnant and can be considered as a dead star in this regard. A "dead" star is one that has no more nuclear fusion going in it. When a star dies, it leaves some remnant behind. Depending on the mass of the star, the remnant can be a white dwarf, neutron star or a black hole.read more >>