A planet is a dark body orbiting a star. All the planet in the Solar System reflect light from the sun. A moon (or satellite) also shines by reflection, but it revolves around a planet.
Of the nine planets, only Mercury and Venus have no known satellites.Spacecraft have helped to discover 16 satellites. Spacecraft have helped to discover 16 satellites around Jupiter.Saturn has the largest satellite in the Solar System, Titan.
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Wednesday, February 3, 2010
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