Across
- 5. group of stars
- 9. sphere gases
- 10. Galaxy shaped the central portion of a spiral galaxy
- 14. earth being the center of the universe
- 17. sphere of water
- 18. spinning motion
- 19. combines atoms
- 20. super continent
Down
- 1. galaxy shaped as pin wheel
- 2. hot magma in the middle of moves crust
- 3. outer most layer of earth
- 4. sphere of stone
- 6. hottest layer of earth
- 7. planets orbit around the sun
- 8. splits atoms
- 11. used for imaging bones
- 12. the sphere of life
- 13. west to east, side to side
- 15. sun's outer atmosphere
- 16. smallest particle in the universe