physics exam 2 study guide, class notes, book, homework-Questions and Answers Graded A+

physics exam 2 study guide, class notes, book, homework-Questions and Answers Graded A+ astronomy change over time main idea - ANSWER-theory changes over time as new information is discovered who is pythagoras - ANSWER-first real astronomer, combined philosophy with math and science Pythagoras views - ANSWER-earth was a sphere, the moon was reflective instead of having its own light, planets move differently than the stars plato and Aristotle relationship - ANSWER-aristotle was his student first to say geocentric - ANSWER-plato plato and artistotle said - ANSWER-geocentric, and objects have natural state natural state aka - ANSWER-natural philosophy Natural state - ANSWER-on earth objects fall down in straight lines, in heavens they move in circles aristotle says - ANSWER-the universe could be understood through observation and philosophy observations that contradicted aristotle - ANSWER-retrograde of mars because movement wasn't circular retrograde of mars - ANSWER-mars looks like it moves backwards sometimes compared to constellations Claudius Ptolemy - ANSWER-created new model for universe Ptolemy's model - ANSWER-geocentric, but planets moved in circular path (deferents) with circular epicycles on top. earth was offset from the center why was the earth offset from the center in ptolemy's model - ANSWER-observations ptolemy's model made to - ANSWER-explain retrograde ptolemy's model made with - ANSWER-math