In astronomy, Kepler's laws of planetary motion are three scientific laws describing the motion of planets around the Sun, published by Johannes Kepler between 1609 and 1619. These modified the heliocentric theory of Nicolaus Copernicus, replacing its circular orbits and epicycles with elliptical trajectories, and explaining how planetary velocities vary.

Kepler's laws of planetary motion give the three laws of Kepler's planetary motion.
They are:

Kepler's First Laws Of Planetary Motion(Law of Ellipses):

The path of the planets about the sun is elliptical in shape, with the center of the sun being located at one focus.

Kepler's Second Laws Of Planetary Motion(Law of Equal Areas):

An imaginary line drawn from the center of the sun to the center of the planet will sweep out equal areas in equal intervals of time

Kepler's Third Laws Of Planetary Motion(Law of Harmonies):

The ratio of the squares of the periods of any two planets is equal to the ratio of the cubes of their average distances from the sun.


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