Upper atmosphere


Upper atmosphere is a collective term that refers to various layers of the atmosphere of the Earth above the troposphere and corresponding regions of the atmospheres of other planets, and includes:
  • The mesosphere, which on Earth lies between the altitudes of about, sometimes considered part of the "middle atmosphere" rather than the upper atmosphere
  • The thermosphere, which on Earth lies between the altitudes of about
  • The exosphere, which on Earth lies between the altitudes of about and
  • The ionosphere, an ionized portion of the upper atmosphere which includes the upper mesosphere, thermosphere, and lower exosphere and on Earth lies between the altitudes of