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Posts: 3560
12 years ago
Which is longer, the sidereal or synodic month?  Why? 
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wrote...
Valued Member
12 years ago
The synodic month takes an extra two days, because the earth is also revolving around the Sun, so after 27.3 days the Moon returns to the same place among the stars, but the earth has revolved about 27 degrees ahead of where it was last month;  it takes the Moon two days to catch up to us. 
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