Chapter 9 THE FAMILY OF STARS
        (3 lectures)

        Section 9-3 skip to The H-R Diagram 
        - Read pp 181-184 (start at H-R Diagram, bottom of p 194,
                           stop at "Luminosity Classification")
        - Study Figures: 9-7, 9-8, 9-9, 9-10, 9-11 

        Section 9-5 A Survey of the Stars
        - Read pp 194-198
        - Study Figures: 9-24, 9-25 
        - Study pp 196-197 "The Family of stars"

        Summary
        - Sec 9-3 bullets 1-3
        - Sec 9-5 bullet  1-2

        New Terms: 
        - HR Diagram
        - main sequence
        - giant (red giant)
        - supergiant
        - red dwarf (small, cool main sequence stars)
        - white dwarf
        - mass-luminosity relationship