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The Karman Line, 100 km (62 miles) above the surface of the earth, is usually regarded as the boundary between the earth's atmosphere and outer space.


The earth's atmosphere has many layers:


  • Magnetosphere - the highest layer
  • Exosphere (500 to 1000 km altitude)
  • Thermosphere (including ionosphere and the Karman Line, 100 km up, which is the boundary between the atmosphere and outer space.
  • Mesosphere
  • Stratosphere (including ozone layer, 15 to 35 km high)
  • Troposphere (including peplosphereor planetary boundary layer) - the lowest layer, whose depth is 17 km (11 miles) at the equator and 7 km (5 miles) at the poles.



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