Stars Part Two: Stellar Evolution. Overview of the life of a star: 1.Formation of protostar from a cloud of mostly Hydrogen gas. 2.Main sequence star.
STAR FORMATION:
Formation of the First Stars Under Protostellar Feedback Athena Stacy First Stars IV 2012.
STAR FORMATION: PROBLEMS AND PROSPECTS Chris McKee with thanks to Richard Klein, Mark Krumholz, Eve Ostriker, and Jonathan Tan.