NOTES: Cepheid Variable Stars: John Goodrick (1784) discovered Delta-Cephei. Henrietta Leavitt (1908)--Period Luminosity Relation: (overlay). Stars varying.
12 April 2005AST 2010: Chapter 221 The Death of Stars.
Astronomy 2010 1 February 21, 2006 Chapter 22: The Death of Stars What happens to old stars? How does death differ for small and large stars?
