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General relativity is a metric theory of gravitation. At its core are Einstein's equations, which describe the relation between the geometry of a four-dimensional pseudo-Riemannian manifold representing spacetime, and the energy–momentum contained in that spacetime.
Sep 15, 2021 · Learn how Einstein's equation relates spacetime curvature to matter and energy in plain English. Discover the meaning and history of the cosmological constant, the metric, and the stress-energy tensor.
- Ethan Siegel
May 2, 2024 · General relativity, part of the wide-ranging physical theory of relativity formed by the German-born physicist Albert Einstein. It was conceived by Einstein in 1916. General relativity is concerned with gravity, one of the fundamental forces in the universe.
- The Editors of Encyclopaedia Britannica
In the general theory of relativity, the Einstein field equations (EFE; also known as Einstein's equations) relate the geometry of spacetime to the distribution of matter within it.
General relativity is Einstein's theory of gravity, in which gravitational forces are presented as a consequence of the curvature of spacetime. In general relativity, objects moving under gravitational attraction are merely flowing along the "paths of least resistance" in a curved, non-Euclidean space.
General relativity is a theory of gravitation developed by Albert Einstein between 1907 and 1915. The theory of general relativity says that the observed gravitational effect between masses results from their warping of spacetime.
Learn about the principle of equivalence, the Einstein field equations, the cosmological constant, and the tests of general relativity. The web page also covers the evolution of the universe, the Friedmann equation, and the standard model of cosmology.
