Astronomy Wiki

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1 August 2024

  • curprev 11:5811:58, 1 August 2024 Advicesound30 Message Wall contribs 529 bytes +529 Created page with "An '''atmosphere''' (from Ancient Greek ἀτμός ''(atmós)'' 'vapour, steam' and σφαῖρα ''(sphaîra)'' 'sphere') is a layer of gasses that envelop an astronomical object, held in place by the gravity of the object. A planet retains an atmosphere when the gravity is great and the temperature of the atmosphere is low. A stellar atmosphere is the outer region of a star, which includes the layers above the opaque photosphere; stars of low temperature might..." Tag: Visual edit