Quiz #3 Ouline of Topics

The Solar System contains: 

    The Sun 
	99.9% of the mass

    Terrestrial Planets
	Mostly rock and metal, high density
	Distance: Mercury, Venus, Earth, Mars
	Mass, Radius: Mercury, Mars, Venus, Earth
	Atmosphere: Mercury, Mars, Earth, Venus
	0.3-1.5 AU

    Jovian Planets
	Mostly hydrogen and helium, low density
	Distance: Jupiter, Saturn, Uranus, Neptune
	5-30 AU

The planets all lie in nearly the same plane and orbit in the same general direction.  
    We understand this, and the composition of the
    planets, as consequences of the way the solar system formed.

Small bodies: 
    Jupiter's Moons
	Galilean moons: Io, Europa, Ganymede, Callisto
	Io and Europa are shaped by their internal energy supplied by tidal forces from Jupiter
    Saturn's Moons
	Titan has a thick atmosphere with a methane hydrological cycle
	Enceladus has fountains which cause it to be bright and supply the E ring.

    Rings
	All four giant planets have ring systems
	Composed of billions of small particles, constantly colliding
	Contained and shaped by "shepherd satellite"
	Located within the tidal radii of the giant planets
    Asteroids and Transneptunian objects
	Located in two broad belts
	Contain hundreds of thousands of objects, but very little mass
	Shaped by orbital resonances with Jupiter and Neptune