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.
Winter solstice
Today in History
More Desktop Wallpapers:
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World Migratory Bird Day
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Gulf Islands National Seashore, Florida
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Winter at Valley Forge
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Squirrel Appreciation Day
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Great Fountain Geyser, Yellowstone National Park, Wyoming
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Patriot Day
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National Trails Day
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World Bee Day
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Busy building wetlands
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The puffin-rabbit connection
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Earth Day and National Park Week
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What the hay?
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Hungarian Parliament Building, Budapest, Hungary
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Looking for peace on the precipice
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World Meteorological Day
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A path lain with petals
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Hey, who’s in charge here?
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Green is the new black
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Irohazaka Road in fall, Nikko, Tochigi, Japan
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‘Fringe’ takes center stage as Edinburgh celebrates the arts
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Zion National Park Turns 100
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Is that a buzzing sound?
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Wilderness Act anniversary
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Halemaumau Crater, Hawaii Volcanoes National Park
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Happy International Beaver Day!
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Badlands National Park turns 44
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Andean cocks-of-the-rock, Ecuador
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Infinity Day
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Three cheers for polar bears!
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Diwali
Bing Wallpaper Gallery

