My trivia and facts on the Universe. Asteroids, black holes, distances, galaxies, light, Mars rovers, Moon landings, stars, Titan, Voyager program, and other Universe trivia and facts.
Thursday, May 6, 2010
A red giant is a very bright giant star in its late phase of evolution, when no hydrogen remains in the core and thermonuclear fusion of hydrogen happens in a shell surrounding the core. A red giant is yellow-orange to red in color.