11 - -After Tycho died, his assistant Johannes Kepler, too...

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- His theory also explained retrograde motion—in a much simpler way. - Outer planets appear to go to retrograde when earth an inner planet catches up with them and passes them in their orbit - Galileo’s observations disproved the geocentric theory. Tycho Brahe - Tycho Braha (1546-1601) was a Danish nobleman - As a child, he had witnessed a solar eclipse - He was so impressed that eclipses could be predicted, that he dedicated his life to astronomy. - He built his own observatory on an island. - He observed a nova or “new star”, and found it was outside the solar system. - Tycho made the most precise observation of the planets to date … without using a telescope. - During his life, Tycho was reluctant to share his precise data. - He also had a wild lifestyle, and lost his nose in a duel. - He attended many royal parties. - Perhaps one too many… he died after eating and drinking too much at a party… Johannes Kepler
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Unformatted text preview: -After Tycho died, his assistant Johannes Kepler, too his place.-Kepler studied Tychos precise observation of the planets.-He noticed petterns in their motion never seen before.-His first model for the planets involved geometric shapes. Initially, Kepler thought the orbits of the planets had the same proportions as the 5 perfect solids of geometry. He worked on this idea for years, but finally admitted it was a failure.-However, kepler did not give up.-He found that the planets motion could be explained if he gave up the idea of the circular orbits. -In time he discovered that all planets follow the same three rules. . Keplers Laws of Planetary Motion I. The orbits of the planets are ellipses with the sun at one focus II. A line from a planet to the sun sweeps over equal areas in equal intervals of time. Size of an Ellipse-An ellipse is a flattened circle....
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11 - -After Tycho died, his assistant Johannes Kepler, too...

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