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post-Newtonian approximation


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An approximation used in the general theory of relativity in which the effects of relativity are regarded as small corrections to the Newtonian solution to the problem being considered. The post-Newtonian approximation is useful for problems in which the correction is small, as in considering relativistic effects on the motions of planets in the solar system. It cannot be used for systems such as black holes, which involve strong gravitational fields.

Subjects: Physics.


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