Aristotle and Ptolemy

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Across
  1. 1. Stellar _____: the appearance of movement of a star as a result of the Earth moving around the sun
  2. 3. Centered on Earth
  3. 4. _____ Sphere: A set of seven nested rings used to predict the positions of planets
  4. 5. Earth astronomy 'computer' used to determine the positions of planets
Down
  1. 1. Used 'epicycles' to explain the motion of planets
  2. 2. Used logical arguments to demonstrate, incorrectly, that the Earth is at the center of the solar system