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Johannes Kepler

Johannes Kepler. 1571-1630 “The first astrophysicist and the last scientific astrologer.”. Key Events in Kepler’s Life. 1571: Born in Weil der Stadt , Swabia, Germany 1589-1594: Attended the University of Tübingen 1600-1601: Brief cooperation with Tycho Brahe.

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Johannes Kepler

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  1. Johannes Kepler 1571-1630 “The first astrophysicist and the last scientific astrologer.”

  2. Key Events in Kepler’s Life 1571: Born in Weil derStadt, Swabia, Germany 1589-1594: Attended the University of Tübingen 1600-1601: Brief cooperation with Tycho Brahe 1609: Published first two laws of planetary motion 1619: Published third law of planetary motion 1627-1630: Publication of the Rudolphine Tables, involvement in Thirty Years’ War, and death at Regensburg, Bavaria, Germany

  3. Kepler’s First Model of the Solar System • Based on his hypothesis of a geometrically ordered universe • Includes only six planets (Uranus and Neptune not discovered yet) • Accepted by Kepler for many years, until he discovered the planetary laws

  4. Kepler’s Laws of Planetary Motion • First law: “A planet moves in an ellipse, with the sun at one focus” • Second law: “A planet sweeps out equal areas and equal time” • Third law: “The squares of the periods of the planets are proportional to the cubes of their average distances from the sun”

  5. Major Works by Kepler • MysteriumCosmographicum: Published 1596. Outlines his theory of a geometric universe and how it came about • Astronomia Nova: Published 1609. Discourse on Tycho’s data and the results of Kepler’s investigation of Mars’ orbit, significant for its first two laws of planetary motion • Harmonices Mundi: Published 1619. Discusses the third and final law of planetary motion • Rudolphine Tables: Published 1627. Kepler’s last major work is a compilation of his and Tycho’s data in the form of star charts and planetary catalogues, named after Holy Roman Emperor Rudolf II

  6. References • http://www-history.mcs.st-andrews.ac.uk/Biographies/Kepler.html • http://galileo.rice.edu/sci/kepler.html • http://www.hulu.com/watch/63319/cosmos-the-harmony-of-the-worlds

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