October 14, 2014
On the day you arrived, the Earth was spinning at a thousand miles per hour, orbiting the Sun at sixty-seven thousand.
Auroral Corona over Norway
Birthday · October 14, 2014
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APOD published October 14, 2014. Credit: Harald Albrigtsen. A publication-date match, not a photo taken on your date. Independent of NASA.
Higher than the highest mountain lies the realm of the aurora. Auroras rarely reach below 60 kilometers, and can range up to 1000 kilometers. Aurora light results from energetic electrons and protons striking atoms and molecules in the Earth's atmosphere. Somewhat uncommon, an auroral corona appears as a center point for a surrounding display and may occur when an aurora develops directly overhead, or when auroral rays are pointed nearly toward the observer. This picturesque but brief green and purple aurora exhibition occurred last month high above Kval�ya, Troms�, Norway. The Sess�yfjorden fjord runs through the foreground, while numerous stars are visible far in the distance. APOD Wall Calendar: Land and Skyscapes
Image credit: Harald Albrigtsen