Spacetime

lastmod 2014-04-03created 2014-04-031 edits

Spacetime (時空間, or 時空) is a four-dimensional model that combines three-dimensional space and one-dimensional time into a single structure, and is an important concept in the theory of relativity. In physics, spacetime is a mathematical model that combines space and time. It makes it possible to explain that the universe is made up of levels ranging from large galaxies to elementary particles.

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• Wikipedia (en) description of spacetime