law of areas

Noun

1.

law of areas - 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" Synonyms: Kepler's second law, law of equal areas

Kepler's law, Kepler's law of planetary motion, Kepler's second law, law of equal areas