Middle atmosphere

Middle atmosphere is a collective term sometimes used to refer to various layers of the atmosphere of the Earth and corresponding regions of the atmospheres of other planets, and includes:


 * The stratosphere, which on Earth lies between the altitudes of about 12 km and 50 km, sometimes considered part of the "lower atmosphere" rather than the middle atmosphere
 * The mesosphere, which on Earth lies between the altitudes of about 50 and 80 km, sometimes considered part of the "upper atmosphere" rather than the middle atmosphere