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    What causes the Northern Lights?

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What causes the Northern Lights?

Astrophysicist Neil deGrasse Tyson speaks with CNN's Anderson Cooper about the vernal equinox, solar eclipse and super moon happening on the same day.

What causes the Northern Lights?

Astrophysicist Neil deGrasse Tyson speaks with CNN's Anderson Cooper about the vernal equinox, solar eclipse and super moon happening on the same day.