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Concept information

solar system > planet > planetary atmosphere

Preferred term

planetary atmosphere  

Definition(s)

  • An atmosphere (from Ancient Greek ἀτμός (atmós) 'vapour, steam', and σφαῖρα (sphaîra) 'sphere') is a layer of gas or layers of gases that envelop a planet, and is held in place by the gravity of the planetary body. A planet retains an atmosphere when the gravity is great and the temperature of the atmosphere is low. (Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Atmosphere)

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http://data.loterre.fr/ark:/67375/MDL-P7KPX8RH-9

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