NATS 1745 Lecture Notes - Equant, Celestial Pole, Eudoxus Of Cnidus
9 Apr 2014
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January 21, 2014: when you travel north or south, the constellations rise and set more rapidly than they would is earth was flat. January 21, 2014: aristarchus (c. 310-230 bc): January 21, 2014: the epicycle model has ccm while explaining: January 21, 2014: precession of the equinoxes, hipparchus discovered that the sun"s coordinates on a given date are shifting backwards ~1/100th degree per year, precession causes all star coordinates to shift 1/100th degree east per year. As a result, by 2200, polaris will no longer mark the north celestial pole: hipparchus" lost star catalogue. This dates the coordinates to hipparchus" time, suggesting that the statue was created from his lost catalogue. Claudius ptolemy (c. 150 ad: author of mathematical treatise , a. k. a. Treatise ), the definitive astronomy textbook for nearly 1500 years: created the ptolemaic model (a modified version of the geocentric epicycle model which matched the observed motion of the planets with greater accuracy).
