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Posted by Joe Antognini on April 10, 2002 00:52:15 UTC

He's pretty much got it! Basically, the moon doesn't actually orbit the Earth. It orbits the sun, but the Earth's gravity changes its normal orbit. If one looks at the orbit of the moon, it looks like a wobbly circle. The Earth causes the wobblieness (If that's even a word), which, from our point of view, makes it look like the moon orbits the earth.

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