Space New Tabs HD Wallpapers Themes

Description

Outer space, also known as outer space, space, referred to as space, outer space or space, refers to the void area outside the Earth's atmosphere and other celestial bodies.

In contrast to vacuum, the outer space contains very low density substances, mainly in the form of plasma hydrogen. Among them are electromagnetic radiation, magnetic fields, and the like. In theory, outer space may also contain dark matter and dark energy.

There is no clear boundary between outer space and the Earth's atmosphere, as the atmosphere gradually thins as altitude increases. Assuming the atmosphere temperature is fixed, the atmospheric pressure will be exponentially reduced to zero as the altitude increases by approximately 1013 mbar.

The International Air Transport Association defines the Carmen line at a height of 100 kilometers, defining the boundary between the current atmosphere and space. The United States has determined that people who arrive at an altitude of 80 kilometers are astronauts. In the process of returning the spacecraft to the Earth, 120 kilometers is the boundary where air resistance begins to take effect.