Johanns, Kepler Johanns, Kepler (AD 1571-1630) , Johann Kepler's (27 December 1571 - 15 November 1630). astronomer German mathematician and astrologer. An important part of the scientific revolution. He discovered the laws of planetary motion in Astronomia nova, Harmonice Mundi, and wrote the book called Epitome of Copernican Astronomy Johann's Kepler career as a math teacher at the school, Graz (later changed to the University of Graz). and the help of the Brahman Cattle mathematician in the patronage of Emperor Rudolf 2 who gather information throughout the life of the planet. And paved the way for Kepler discovered the laws of planetary motion at a later time, that is, the orbit of each planet is an ellipse. He worked in optics And help support the discovery of the telescope of Galileo. Galilei , he was hailed as "the first theoretical astrophysicists," but Carl Sagan, praised him as. The last scientific astrologer Kepler's laws rules of the ellipse: the elliptical planetary orbits around the sun. With the Sun at one focus Rules of sweeping the area: In the same planet, there will be areas in which the ray from the sun to the planet sweeps the same or dA / dt is constant law of periods: the period of. The orbit around the sun is directly proportional to the second half of the orbit to the third axis which to discover the laws of motion of the planets around the sun, Kepler is the cornerstone of astronomy today.
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