NOVA

Why Eclipses Don't Happen Every Month

Clip: Season 44 Episode 11 | 1m 47s | Video has closed captioning.

Why don't solar eclipses happen every month? After all, you only need three things to make a solar eclipse: the Sun, the Earth and the Moon.

Aired: 08/21/17

Rating: NR

Problems Playing Video? | Closed Captioning

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