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Noun: Kepler's second law
  1. A law concerning the speed at which planets travel; a line connecting a planet to the sun will sweep out equal areas in equal times
    "Kepler's second law means that a planet's orbital speed changes with its distance from the sun";
    - law of areas, law of equal areas

Type of: Kepler's law, Kepler's law of planetary motion

Encyclopedia: Kepler's second law