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It’s going to be a long night.

In the Northern Hemisphere, that is. Tonight is the #WinterSolstice, which occurs when either of Earth's poles reaches its maximum tilt away from the Sun. This happens twice yearly, once in each hemisphere. Learn more: https://go.nasa.gov/3vbLGJY
#NASA

Behold a Winter Solstice

The Earth's solstices come twice a year. For the Northern Hemisphere, this year's winter solstice happens on Dec. 21.
Yvette Smith (NASA)
#NASA #wintersolstice

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