nearspace

(Earth's exosphere, aviation) The region of the atmosphere between the Armstrong limit and the Karman limit. A region that is "near" outer space.

(Earth's exosphere, aeronautics) The region of the exosphere between the lower bound of space and the lower bound of orbit. A region of space that is "near".

(Earth's exosphere, astronautics) The region of space near the Earth.

(Earth, meteorology) The mesosphere and lower thermosphere