Spacetime

:See Space-time theories of consciousness for the philosophy topic.

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In physics, spacetime is a model that combines space and time into a single coordinate system called the space-time continuum. In our universe, this continuum has three dimensions of space and one dimension of time. Here, time is expressed in the same units as space by multiplying time measurements by the speed of light.

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Spacetime is vital to the theories of special relativity and general relativity.

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Space-time continua 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 space-time, or the motion of light around a rotating star may be described in another type of space-time.

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A point in space-time is usually referred to as an event. An example of an event may be the explosion of a star. The worldline of a particle or light beam is the path that this particle or beam takes in the space-time, the shortest path between any two points being called a geodesic (of the spacetime). In classical physics, geodesics are timelike or null (light-like).

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Space-time theories of consciousness: Space-time theories of consciousness relate the geometrical features of conscious experience, such as viewing things in space-time at a point, to the geometrical properties of the universe itself. These theories sometimes make specific predictions, and so their proponents assert that they should be ...

Philosophy: Philosophy is a discipline or field of study involving the investigation, analysis, and development of ideas at a general, abstract, or fundamental level. It is the discipline in search for a general understanding of values and reality by chiefly speculative rather than observational means. The term...

Physics: Physics (from the Greek, φυσικός (phusikos), "natural", and φύσις (phusis), "nature") is the science of the natural world in the broadest sense, dealing with matter and energy and the fundamental forces of nature that govern the interaction...

Spacetime related Images and Photos (experimental)

The Nature of Space and Time Book (Paperback)

The Future of Spacetime Book (Paperback)