Astronomy 104- Final review

Astronomy 104- Final review - Book Notes Chapter 10:...

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Book Notes Chapter 10: Planets and moons are held together by self-gravity Both the moon and the sun create tides on earth As earth rotates, tides rise and fall twice each day Tidal forces lock the Moon’s rotation to its orbit around Earth Tidal forces cause the Moon’s orbit to grow and Earths rotation rate to slow Tidal forces make orbits circular Tidal stresses are stronger than self-gravity inside the Roche limit Tidal forces create gaps in the distribution of asteroid orbits Tidal forces control the orbits of particles in planetary rings Chapter 11: The moons of the outer solar system are composed of rock and ice Some moons were formed along with their parent planets; others were captured later A few moons are geologically active; most are dead Jupiter’s moon Io is the most volcanically active body in the Solar System. Saturn’s moon Enceladus is erupting water=ice crystals into space Jupiter’s moon Europa may contain an enormous sub-surface ocean All four giant planets are surrounded by rings Saturn’s ring system is the most complex Some rings may be transient features held in place by moons Planetary rings are ephemaral
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Astronomy 104- Final review - Book Notes Chapter 10:...

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