Geocentric Crossword Puzzle

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Across
  1. 6. the study of the workings of the universe on the largest scales
  2. 7. a greek astronomer that constructed the most complete geocentric model of all tome around A.D. 140
  3. 8. determining the precise dates of holy days or the direction of Mecca from any given location on earth
  4. 10. earth lays at the center of the universe and all other bodies move around it
  5. 11. each planet was taken to move uniformly around a small circle
  6. 12. motion: the backward loops
Down
  1. 1. the line joining the center of the inner circle to the so-called heel stone
  2. 2. today is one of the most popular tourist attractions in Britain
  3. 3. center moved a second and larger circle
  4. 4. labeling regions of the celestial sphere
  5. 5. the explosion of a giant star
  6. 9. proposed that all the planets revolve around the sun and the earth rotates on its axis once each day