ASTR 170B2 Lecture Notes - Lecture 5: Apparent Retrograde Motion, Copernican Revolution, Retrograde And Prograde Motion
29 Sep 2017
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They didn"t observe apparent changes in the positions or separations of the stars. Copernicus: inspired by the growing discrepancies, revived the sun- centered model of aristarchus (1700 years earlier) he considered this model to be simpler than the ptolemaic model. The idea of rapidly moving earth was still hard to sell. Copernican model stuck with the idea that circles were fundamental descriptions of planetary motion. Ultimately, the copernican model while simpler, was no more accurate at predicting planetary positions than the. Tycho brahe (1546-1601) complied the most accurate measurements of planetary positions using naked eye observations. Believed earth centered model was therefore correct, but recognized that other planets orbit the sun. Observed a nova- more evidence that the heavens weren"t perfect or constant that stars perhaps farther away than believed. Hired kepler to use his measurements to develop a better model. Which of the following was not a contribution made by tycho.
