Aurora-SpaceShuttle-EO


Forfatter/Opretter:
NASA (Crew of STS-39)
(The original uploader was Seth Ilys at engelsk Wikipedia.)
størrelse:
1782 x 1173 Pixel (571614 Bytes)
beskrivelse:
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.
Licens:
Public domain
Kommentar på licensen:
Public domain Denne fil er i offentligt domæne i USA fordi den udelukkende er skabt af NASA. NASAs ophavsretspolitik erklærer at materiale udgivet af NASA ikke er omfattet af ophavsret medmindre andet er nævnt. (Se også Template:PD-USGov, NASAs ophavsretspolitik eller JPLs politik for brug af billeder.)
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Yderligere oplysninger om licens til billedet kan findes her. Sidste ændring: Sun, 14 Apr 2024 16:12:12 GMT