Across
- 4. the sixth planet
- 7. the eighth planet
- 9. the second planet
- 11. the seventh planet
- 12. the third planet
- 13. earth's natural satellite
- 14. all the planets and the sun
Down
- 1. when something spins in place
- 2. a dirty snowball
- 3. the fifth planet
- 5. a large space rock
- 6. a vaporized comet or asteroid
- 8. a dwarf planet
- 10. what the planets revolve around
- 13. the fourth planet
- 15. when something spins around something else
- 16. the first planet