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Description The Aurora Australis as seen from the Space Shuttle Discovery on STS-39. The payload bay and tail of Discovery can be seen on the left hand side of the picture. Auroras are caused when high-energy electrons pour down from the Earth’s magnetosphere and collide with atoms. Red aurora occurs from 200 km to as high as 500 km altitude and is caused by the emission of 6300 Angstrom wavelength light from oxygen atoms. Green aurora occurs from about 100 km to 250 km altitude and is caused by the emission of 5577 Angstrom wavelength light from oxygen atoms. The light is emitted when the atoms return to their original unexcited state.
Date
Source http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=4800
Author NASA (Crew of STS-39)
(The original uploader was Seth Ilys at English Wikipedia.)
Permission
(Reusing this file)
Public domain This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
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This image or video was catalogued by one of the centers of the United States National Aeronautics and Space Administration (NASA) under Photo ID: STS039-342-28.

This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing.
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Date/TimeThumbnailDimensionsUserComment
current21:15, 7 January 2009Thumbnail for version as of 21:15, 7 January 20091,782 × 1,173 (558 KB)WronkiewHigher resolution
04:40, 16 January 2005Thumbnail for version as of 04:40, 16 January 2005874 × 576 (51 KB)Nordelch{{PD-USGov-NASA}}

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