Lecture Notes: 

Lecture #24 April 15

    moon
    radius (km)
    density (gm/cc)
    albedo
    period (days)
    Moon
    1738
    3.4
    .12
    27.3
    Io
    1815
    3.6
    .61
    1.8
    Europa
    1569
    2.9
    .64
    3.6
    Ganymede
    2631
    1.9
    .42
    7.2
    Callisto
    2400
    1.8
    .2
    16.7