Astronomy Ancient Philosophies Aristotle (384-322) B.C. Greek philosopher Believed the Earth was the center of the universe Earth was surrounded by water,
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Post on 27-Mar-2015
Slide 1 Slide 2 Astronomy Ancient Philosophies Slide 3 Aristotle (384-322) B.C. Greek philosopher Believed the Earth was the center of the universe Earth was surrounded by water, air, and fire Slide 4 Aristotle He thought that the moon, sun, five planets, and the stars all revolved around the Earth Geocentric model Slide 5 Aristarchus (3rd Century B.C) Sun is the center of the universe Heliocentric model First to measure the distance to the sun and moon Slide 6 Aristarchus REVOLUTION is the cycle in which a planet orbits the sun (one year) ROTATION is the cycle of a planet spinning on its axis; day to night (one day) Slide 7 What is an axis? Imaginary line on which an object rotates Earths axis goes through its center from the North to the South Pole Slide 8 Questions What is the major difference between the universe models of Aristotle and Aristarchus? How is rotation different from revolution? Slide 9 Ptolemy (2nd century A.D) Agreed with ARISTOTLES geocentric model Retrograde motion is the idea that a planet moves back and forth in a looping motion; Mars (p.434) Slide 10 Copernicus (1473-1543) Heliocentric model Expanded the ideas of Aristarchus Identified the positions of the planets Slide 11 Galileo (1564-1642) Spent most of his life trying to prove the theories of Copernicus First to effectively use the telescope page 439 Slide 12 Roman Catholic Philosophy Earth and humans are the center of all things Slide 13 Questions Why would the Roman Catholics care whether the Earth was the center of the universe? What is retrograde motion? Slide 14 Questions What is the difference between heliocentric and geocentric? What was Ptolemys theory? Why was Galileo important?
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