Johannes Kepler
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Transcript of Johannes Kepler
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Johannes Kepler
T J Osler
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Johannes Kepler (pronounced /ˈkɛplɚ/) (December 27, 1571 – November 15, 1630) was a German mathematician
, astronomer and astrologer, and key figure in the 17th century scientific revolution
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The Great Comet of 1577, which Kepler witnessed as a child, attracted the attention of astronomers across Europe
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• In astronomy, Kepler's three laws of planetary motion are:
• "The orbit of every planet is an ellipse with the sun at a focus."
• "A line joining a planet and the sun sweeps out equal areas during equal intervals of time."[1]
• "The square of the orbital period of a planet is directly proportional to the cube of the semi-major axis of its orbit."
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Five Platonic Solids
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Kepler's Platonic solid model of the Solar system from Mysterium Cosmographicum (1600)
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Closeup of inner section of the model
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A plate from Astronomiae Pars Optica, illustrating the structure of eyes
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Diagram of the geocentric trajectory of Mars through several periods of retrograde motion.Astronomia
nova, Chapter 1, (1609).
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Karlova street in Old Town, Prague – house where Johannes Kepler lived
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Geometrical harmonies in the perfect solids from Harmonices Mundi (1619)
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The iconic frontispiece to the Rudolphine Tables celebrates the great astronomers of the
past:Hipparchus, Ptolemy, Copernicus, and most prominently, Tycho Brahe
See http://www.hps.cam.ac.uk/starry/ for details of above.
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Kepler's horoscope for General Wallenstein
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The GDR stamp featuring Johannes Kepler.
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10 euro Johannes Kepler silver coin