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The Moon itself does not wax and wane; the Moon is a lifeless ball of rock, unchanging. It is our perspective on the Moon that changes, as the Moon orbits the Earth and the arrangement of the Sun, the Earth and the Moon changes in a monthly cycle. Because we live on the Earth, but the light that illuminates the Moon comes from the Sun, our view of the Moon changes as the Moon orbits the Earth and the side we see is alternately illuminated and dark.

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โˆ™ 2010-05-09 17:58:26
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Q: What causes the moon to wax and wane?
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