space-time A four-dimensional reference frame, consisting of - TopicsExpress

space-time A four-dimensional reference frame, consisting of three dimensions in space and one dimension in time, used especially in Relativity Theory as a basis for coordinate systems for identifying the location and timing of objects and events. In General Relativity , space-time is thought to be curved by the presence of mass, much as the space defined by the surface of a piece of paper can be curved by bending the paper. See more at relativity.

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