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three-body problem

[three-bod-ee] /ˈθriˈbɒd i/
noun, Astronomy, Mechanics.
1.
the problem of calculating the motions of three bodies in space moving under the influence of only their mutual gravitational attraction.
Compare two-body problem.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2016.
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Historical Examples
  • Astronomers quail at the three-body problem and throw up their hands in surrender before the four-body problem.

    The Syndic C.M. Kornbluth

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