White Dwarf
WHITE DWARF
White dwarfs are stars that are nearing the ends of their lives, having exhausted the hydrogen and helium in their interiors by nuclear reactions. They are considered the next-to-final stage in stellar evolution for less than 1.4 times as massive as the Sun, the final being black dwarfs, or burned out stars. The best-known white dwarf is the companion of Sirius, the brightest star in EarthÕs sky. White dwarfs are actually reddish in color.