Chapter 4 THE ORIGIN OF MODERN ASTRONOMY 

        Section 4-3: The Puzzle of Planetary Motion
        - Read pp 68-75 (concentrate on Kepler's Three Laws) 
        - Study Figures 4-20, 4-21
        - Study Table   4-1

        Summary 
        Sec 4-3: bullets 3-5 (of 5)

        New Terms:
        - semimajor axis
        - eccentricity
        - ellipse


        Chapter 5 GRAVITY

        Section 5-1: Galileo and Newton
        - Read pp 82-86
        - Study Figures 5-5, 5-6 
        - Study Table s 5-1

        Section 5-2: Orbital Motion and Tides 
        - Read pp 86-90 (stop at Newtons Version of Keplers...)
        - Study Figure 5-7
        - Study pp 88-89 "Orbiting Earth"

        Summary
        Sec 5-1: bullets 2-8, 10-11 (of 12)
        Sec 5-2: bullets 1-7 (of 12)

        New Terms:
        - acceleration of gravity
        - acceleration
        - mass
        - inverse square relation
        - angular momentum
        - circular velocity
        - center of mass
        - escape velocity