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JOHANNES KEPLER (:

JOHANNES KEPLER (:. Done by: V. Ramya Nur Dayana Mimi Amira Hanin Insyirah. BIOGRAPHY. December 27, 1571  November 15, 1630 German mathematician , astronomer  and  astrologer , and key figure in the 17th century . CONTRIBUTIONS (:. known for his laws of planetary motions

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JOHANNES KEPLER (:

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  1. JOHANNES KEPLER (: Done by: V. Ramya Nur Dayana Mimi Amira Hanin Insyirah

  2. BIOGRAPHY • December 27, 1571  • November 15, 1630 • German mathematician, astronomer and astrologer, and key figure in the 17th century 

  3. CONTRIBUTIONS (: • known for his laws of planetary motions  Kepler published Astronomia nova (1609) 1. Elliptical Orbit  Each planet revolves around the Sun in an orbit  First to use focus in mathematical sense  The observations and theories proved that the theory of the circular orbits wrong 2. Speed Kepler showed that a planet moves slower when it is farther away from the Sun

  4. CONTRIBUTIONS • provided the basis for Newton’s theory of gravity • worked in the field of optics and invented an improved version of the refracting telescope called the Keplerian Telescope.This helped to legitimize the telescopic discoveries made by Galileo

  5. CONTRIBUTIONS • Kepler analysed Brahe’s observations of Mars which made Brahe impressed of Keple’s theoretical ideas • Kepler wanted to test his theory based on Brahe’s data but realised that it would take up to 2 years to complete

  6. CONTRIBUTIONS • When Brahe died, Kepler was appointed his successor • He had the responsibility of finishing Brahe’s uncompleted work • -Tycho died on October 24 1601. 2 days later, Kepler was appointed as his successor and bore the responsibility of finishing Tycho’s uncompleted work

  7. CONTRIBUTIONS • Kepler published astrological calendars very popular  helped offset the costs of producing his other work. forecast planetary positions and weather as well as political events which were accurate due to his keen grasp of contemporary political and theological tensions. By 1624, however, the escalation of those tensions and the ambiguity of the prophecies meant political trouble for Kepler and his final calendar was publicly burned in Graz.

  8. SIGNIFICANCE • His book Epitome of Copernican Astronomy was read widespread in Europe and continued to spread his ideas after his death • to support Copernicus with substantial evidence, and he consequently did much to help explain the great mystery of planetary orbits. • His work convinced people that the universe was heliocentric and he openly supported Copernicus’s theory. • Kepler's discoveries and intricate calculations were vital as a basis for Isaac Newton later work.

  9. Significance of main contributions • Invention and improvement of the refracting telescope called the Keplerian Telescope, helped to legitimize the telescopic discoveries made by Galileo -> Galileo was then able to make very detailed observations of the stars that he could not have done with the naked eye alone • Integrated physics and astronomy together -> his book tried to explain planetary motions through physical causes -> introduced new ideas/new way of thinking • Spread of his ideas even after his death -> opened up new mindsets

  10. REFERENCES • http://library.thinkquest.org/3461/kepler_m.htm • OURSELVES ♥ • I DON’T KNOW WHERE MIMI GOT THE INFO FROM. (:

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