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WordReference Random House Unabridged Dictionary of American English © 2024law′ of ar′eas, [Astron.]- AstronomySee under Kepler's laws.
WordReference Random House Unabridged Dictionary of American English © 2024Kep′ler's laws′, [Astron.]- Astronomythree laws governing planetary motion: each planet revolves in an ellipse, with the sun at one focus;
the line connecting a planet to the sun sweeps out equal areas in equal periods of time (law of areas);
the square of the period of revolution of each planet is proportional to the cube of the semimajor axis of the planet's orbit (harmonic law.)
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