Winter solstice Dec 21, 2022

Winter solstice

The days only get longer from here! The Northern Hemisphere marks the beginning of winter today, but the winter solstice is also the shortest day of the year. The rainbow that encircles the sun in our image, a sun halo, is above Lake Antermoia, in the Dolomite Mountains of northern Italy. Sun halos form when sun or moon light shines through ice crystals suspended in the upper atmosphere. When the light of the sun hits the crystals they serve as a prism, separating the light into individual colors of the spectrum, the same way rainbows occur after a rain shower.

© Walter Donega/Getty Images

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Today in History

Dec 21, 2018Paper lanterns on the longest night
Dec 21, 2019Seventeen arches at sunset
Dec 21, 2020Shadows on the solstice
Dec 21, 2021Winter solstice
Dec 21, 2023Winter solstice
Dec 21, 2024Happy winter solstice!

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