August 13, 2022

Outer space, also called outer space or just space, are astronomical terms for what is outside the Earth's atmosphere. This differs from the universe, which denotes everything in its entirety, while outer space is empty space in general. The official and most accepted boundary between the Earth's atmosphere and outer space is at an altitude of 100 km, while the US Air Force gives the title of "astronaut" to anyone who flies higher than 80.5 km.

See also

Space travel The solar system The Milky Way Astronomy