Concept information
Preferred term
exosphere
Definition(s)
- 1) The outermost portion of the Earth's atmosphere. Extremely tenuous, it lies above the ionosphere from a height of about 500 km, to the edge of interplanetary space. 2) An extremely tenuous kind of atmosphere surrounding a solar system body. Since the mean free path is much greater than the atmospheric scale height. The atoms or molecules never collide with each other. (An Etymological Dictionary of Astronomy and Astrophysics, by M. Heydari-Malayeri, https://dictionary.obspm.fr/index.php?formSearchTextfield=exosphere&formSubmit=Search&showAll=1)
Broader concept(s)
In other languages
-
French
-
couronne terrestre
-
géocouronne
URI
http://data.loterre.fr/ark:/67375/MDL-HXR7FG4D-P
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