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What makes up the solar system?
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• The Sun the eight official planets, at least
  three "dwarf planets", more than 130 satellites
  of the planets, a large number of small bodies
  (the comets and asteroids),

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List the inner planets
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• Mercury
• Venus
• Earth
• Mars

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List the outer planets
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Jupiter Saturn Uranus Neptune
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Describe the terrestrial planets
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• Mercury, Venus, Earth, and Mars
• composed primarily of rock and metal and have
  relatively high densities, slow rotation, solid
  surfaces, no rings and few satellites.

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Describe the gas planets
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• Jupiter, Saturn, Uranus, and Neptune
• composed primarily of hydrogen and helium and
  generally have low densities, rapid rotation,
  deep atmospheres, rings and lots of satellites.