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How Many Moons?

A whirlwind of "new moon" discoveries have kept teachers, textbooks, and web sites scrambling to keep up. In an effort to set the record straight, listed below are the number of known moons in our solar system as of March, 2009.

PlanetNumber of Moons
Mercury 0
Venus 0
Earth 1
Mars 2
Jupiter 63
Saturn 61
Uranus 27
Neptune 13
Pluto 3
astronaut on Phobos
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