Johannes Kepler

Laws of planety motion

There are three main laws; 1) The orbit of a planet has these ellipses with the Sun at one of the two foci, 2) A line segment joining a planet and the sun sweeps out equal areas during equal intervals of time, 3) The square of the orbital period of proportional to the cube of the cube of the semi-major axis of its orbit. Basically the process of how the planets rotate around the sun. The laws describe how the cycles form ellipses rather than circles. Every planet has these ellipses with their sun.


Born on December 17th, 1571 at Free Imperial City of Weil der Stadt, Holy Roman Empire and died November 15th, 1630. He attented both University of Linz and University of Tubingen.