N-body problem
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In physics, the n-body problem is the problem of predicting the individual motions of a group of celestial objects interacting with each other gravitationally. Solving this problem has been motivated
Real motion versus Kepler's apparent motion
Restricted three-body problem
General relativity
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General relativity, also known as the general theory of relativity, and as Einstein's theory of gravity, is the geometric theory of gravitation published by Albert Einstein in May 1916 and is the acce
N-body problem
…problem can only be solved completely in particular cases. In general, the problem is chaotic and can only be solved numerically. The n-body problem in general relativity is considerably more difficult to solve. Knowing three orbital positions of a planet's orbit – positions obtained by Sir Isaac Newton from astronomer…
Einstein cross: four images of the same astronomical object, produced by a gravitational lens
Artist's impression of the space-borne gravitational wave detector LISA
This blue horseshoe is a distant galaxy that has been magnified and warped into a nearly complete ring by the strong gravitational pull of the massive foreground luminous red galaxy.
Projection of a Calabi–Yau manifold, one of the ways of compactifying the extra dimensions posited by string theory