How far apart are solar and lunar eclipses?


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Solar The phase diagram shows that a solar and lunar eclipse should happen every month but eclipses actually happen only twice a year. You can see why if you look at the Moon's orbit. In order for an eclipse to occur, the Moon must be in the Sun's ecliptic plane AND exactly at the new or full phase. Usually, the Moon crosses the ecliptic plane at another phase. ChaCha out.

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