• Atmosphere


  • It is a layer of gases that may surround a star or planet of sufficient mass, and that is held in place by the gravity of the body. [1]
  • Gas giants consist mainly of various gases, but only their outer layer is their atmosphere.[1]
  • The outer layer of a star is considered to be its atmosphere.[1]
  • HD 209458 b was the first exoplanet where an atmosphere has been confirmed.[1]



  1. 1.0 1.1 1.2 1.3

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