Space (space) — a relatively empty areas of the Universe that lie outside the boundaries of the atmospheres of celestial bodies. Contrary to popular belief, space is not completely empty space — it there is a very low density of some particles (mostly hydrogen), as well as electromagnetic radiation and interstellar matter. In its original sense of the Greek term "cosmos" was a philosophical basis for defining a hypothetical closed vacuum around the Earth center of the Universe [1]. However, in languages with Latin-based and borrowings to the same semantics used practical the term "space" (as from a scientific point of view, enveloping the Ground the vacuum is infinite), so in Russian and the languages close to him as the result of reform adjustments, was born a kind of oxymoron "outer space".