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Pictured, behind this darker cloud, is a pileus iridescent cloud, a group of water droplets that have a uniformly similar size and so together diffract different colors of sunlight by different amounts. The above image was taken just after the picturesque sight was noticed by chance by a photographer in Ethiopia.

via APOD

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• Our Strange Sky: For the First Time in Half a Century, Puyehue Erupts!
• Our Gorgeous Sky: Terje Sorgjerd’s Observations from El Teide, Spain’s Highest Mountain
• In Antarctica: Lake Vostok, the Ancient Lake.
• Good Morning, Earth! You Look So Fine Time Lapsed at 17,239 MPH.