NATS 1745 Lecture Notes - Lecture 5: Celestial Pole, Star Catalogue, Equant
2 Apr 2017
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2014: when you travel north or south, the constellations rise and set more rapidly than they would is earth was flat. 2014: aristarchus (c. 310-230 bc), used earth"s shadow on the eclipsed moon to measure the moon"s size relative to. Animation: eudoxus" explanation for retrograde motion: aristotle (384-322 bc), unlike plato, he taught that theories must match observation, but his neglect of quantitative analysis led him to the wrong conclusions, the aristotelian model: Animation: the epicycle model: the epicycle model has ccm while explaining, retrograde motion, non-constant brightness, non-constant apparent speeds. 2014: 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. 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.
