A Full Sky Aurora Over Norway
Image Credit & Copyright: Sebastian Voltmer
Explanation: Higher than the
highest building, higher than the
highest mountain, higher than the
highest airplane, 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
molecules in the
Earth's atmosphere. Frequently, when viewed from space, a
complete aurora will appear as a circle around one of the Earth's
magnetic poles. The
featured wide-angle image,
horizontally compressed, captured an
unexpected auroral display that stretched across the sky five years ago over eastern
Norway.
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