Across
- 3. had Kepler as an assistant
- 5. Greek who said universe in 2 parts imperfect earth, perfect heavens
- 6. circular motion of planets
- 8. 3rd rock from the sun
- 10. astrological circle in Wyoming
- 15. number of full planets in our solar system
- 17. large stones in Wales
- 19. earth's star
- 20. earth at the center of the universe
Down
- 1. closest star to our sun
- 2. created scientific method
- 4. name of our galaxy
- 7. created epicycles
- 9. distance from the earth to the sun
- 11. sun at the center of the solar system
- 12. pioneered the laws of motion
- 13. calculated earth's radius
- 14. 1st to say heliocentric universe
- 16. said path of planets was an elipse
- 18. group of billions of stars, planets, and dust