| | Spacetime Continuum -- Recommendations and Resources (Site not responding. Last check: 2007-10-23) |
 | | Spacetimes are the arenas in which all physical events take place — for example, the motion of planets around the Sun may be described in a particular type of spacetime, or the motion of light around a rotating star may be described in another type of spacetime. |
 | | In a curved spacetime, moving objects travel along geodesics, which, in a sense, is the shortest path between two points. |
 | | The existence of curved spacetime is predicted by General relativity, and is described mathematically using concepts from differential geometry. |
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