NOVA

Why Eclipses Don't Happen Every Month

Clip: Season 44 Episode 11 | 1m 47s

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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Parentalogic

Parenting is full of obstacles that can be hard to navigate—even without a toddler yelling at your face. There’s no instruction manual, which means discerning fact from fiction and reasonable from ridiculous can be maddening. That’s where Parentalogic comes in, a digital series from NOVA and PBS Digital Studios.

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