Kepler Laws

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Kepler Laws

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The three empirical laws governing the motions of planets in their orbits, discovered by Johannes Kepler (1571-1630). These are: (a) the orbits of the planets are ellipses, with the sun at a common focus; (b) as a planet moves in its orbit, the line joining the planet and sun sweeps over equal areas in equal intervals of time (also called law of equal areas ); (c) the squares of the periods of revolution of any two planets are proportional to the cubes of their mean distances from the sun. </dd>

References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use