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