Aurora australis from space shuttle

Forfatter/Opretter:

NASA

Kredit:

http://www.nasa.gov/images/content/111716main_aurora_from_shuttle.jpg

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https://dkwiki.dk/b/1104a

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Wikimedia Commons

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beskrivelse:

Aurora Australis: This view of the Aurora Australis, or Southern Lights, which was photographed by an astronaut aboard Space Shuttle Discovery (STS-39) in 1991, shows a spiked band of red and green aurora above the Earth's Limb. Calculated to be at altitudes ranging from 80 - 120 km (approx. 50-80 miles), the auroral light shown is due to the "excitation" of atomic oxygen in the upper atmosphere by charged particles (electrons) streaming down from the magnetosphere above. Credit: NASA

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Public domain

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PD-USGOV-NASA