Staradigm Pdf __full__ -

For decades, astronomers have relied on the standard model of stellar evolution, which describes the life cycle of stars from protostar formation to their eventual demise as white dwarfs, neutron stars, or black holes. This model, while successful in many respects, has been unable to explain several observed phenomena, such as the unusual properties of certain star clusters, the presence of " fossil" stars, and the unexpectedly high number of red giant stars.