White dwarfsWhite dwarfs

Stars die in different ways depending on their mass. Very massive stars may end their lives as a neutron star or black hole, but low mass stars often become white dwarfs after they have exhausted their nuclear fuel. A white dwarf is roughly the size of earth, and even though fusion has stopped it is still hot. It can take a long time - billions of years - for a white dwarf to cool down enough to stop emitting light.