Kepler's third law

Definitions of Kepler's third law
  1. noun
    a law stating that the ratio of the square of the revolutionary period (in years) to the cube of the orbital axis (in astronomical units) is the same for all planets
    synonyms: harmonic law
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    type of:
    Kepler's law, Kepler's law of planetary motion
    (astronomy) one of three empirical laws of planetary motion stated by Johannes Kepler
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