Kepler's Laws of Planetary Motion

Kepler’s First Law (Law of Ellipses)

Every planet moves around the Sun in an elliptical orbit, with the Sun at one focus.

Kepler’s Second Law (Law of Equal Areas)

A line drawn from the Sun to a planet sweeps out equal areas in equal intervals of time.

Kepler’s Third Law (Law of Harmonies/Periods)

the square of the orbital period of a planet is directly proportional to the cube of the mean distance from the sun

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