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Luminous part of the outermost region of the Earth's atmosphere
The geocorona is the luminous part of the outermost region of the
Earth's atmosphere, the
exosphere. It is seen primarily via
far-ultraviolet
light (
Lyman-alpha) from the
Sun that is
scattered from
neutral hydrogen.
[1] It extends to at minimum 15.5
Earth radii and probably up to about 100 Earth radii (for context, the Moon is approx. 60 Earth radii away).
[2] The geocorona has been studied from
outer space by the
Astrid satellites and the
Galileo spacecraft (among others), using its ultraviolet
spectrometer (
UVS) during an
Earth
flyby.
See also
References
-
^ Kameda, S.; Ikezawa, S.; Sato, M.; Kuwabara, M.; Osada, N.; Murakami, G.; Yoshioka, K.; Yoshikawa, I.; Taguchi, M.; Funase, R.; Sugita, S.; Miyoshi, Y.; Fujimoto, M. (16 December 2017).
"Ecliptic North-South Symmetry of Hydrogen Geocorona". Geophysical Research Letters. 44 (23): 11, 706–11, 712.
Bibcode:
2017GeoRL..4411706K.
doi:
10.1002/2017GL075915.
-
^ Baliukin, I. I.; Bertaux, J.-L.; Quémerais, E.; Izmodenov, V. V.; Schmidt, W. (15 February 2019).
"SWAN/SOHO Lyman‐α mapping: the Hydrogen Geocorona Extends Well Beyond The Moon" (PDF). Journal of Geophysical Research: Space Physics. 124 (2): 861–885.
Bibcode:
2019JGRA..124..861B.
doi:
10.1029/2018JA026136.
S2CID
135304690.
External links