General relativity, known as the general theory of relativity and Einstein's theory of gravity, is the geometric theory of gravitation published by Albert Einstein in 1915 and is the current description of gravitation in modern physics.
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Some predictions of general relativity are beyond Newton's law of universal gravitation in classical physics.
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Reconciliation of general relativity with the laws of quantum physics remains a problem as there is a lack of a self-consistent theory of quantum gravity.
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Widely acknowledged as a theory of extraordinary beauty, general relativity has often been described as the most beautiful of all existing physical theories.
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General relativity has acquired a reputation as a theory of extraordinary beauty.
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General relativity can be understood by examining its similarities with and departures from classical physics.
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The generalization of this statement, namely that the laws of special relativity hold to good approximation in freely falling reference frames, is known as the Einstein equivalence principle, a crucial guiding principle for generalizing special-relativistic physics to include gravity.
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General relativity predicts that the path of light will follow the curvature of spacetime as it passes near a star.
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Whenever the ratio of an object's mass to its radius becomes sufficiently large, general relativity predicts the formation of a black hole, a region of space from which nothing, not even light, can escape.
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General relativity plays a central role in modelling all these phenomena, and observations provide strong evidence for the existence of black holes with the properties predicted by the theory.
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Spacetime symmetry group for special General relativity is the Poincare group, which is a ten-dimensional group of three Lorentz boosts, three rotations, and four spacetime translations.
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General relativity has emerged as a highly successful model of gravitation and cosmology, which has so far passed many unambiguous observational and experimental tests.
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