Outer space

by Lewis Carroll

Outer space – the volume of space that is outside the Earth’s atmosphere is called outer space. Cosmic bodies such as galaxies, the starry sky, nebulae, planets, etc. move in it. Outer space is permeated with streams of cosmic rays and electromagnetic radiation. It contains fields that influence physical processes.
According to the generally accepted opinion, the boundary between the Earth’s atmosphere and outer space is located at an altitude of 100 kilometers above the surface of the geoid. This provision is enshrined in an international legal act, and also has physical grounds, since this is the minimum possible perigee height for a satellite in Earth orbit.

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