IndexThe Origin of the UniverseA survey of the evidence
Introduction |
Star Sizes and Absolute Magnitudes
Astronomers understand stellar energy production processes. They understand how a star's luminosity is related to its size. They understand how a star's spectrum is related to its temperature. From a star's parallax distance, temperature and luminosity they can calculate its absolute magnitude - the brightness it would have, if it were a fixed distance from us. Astronomers have determined the size and absolute magnitudes of millions of nearby stars. |