Across
- 3. go fast
- 8. a hole in the ground made by an meteorite
- 9. a piece of rock in space
- 11. a world
- 12. a planet with a ring around it
- 13. Earth has one
- 14. a planet
- 16. 8th planet
- 17. 2nd planet
- 18. our world
Down
- 1. a sun
- 2. it's red on Mars
- 4. red planet
- 5. biggest planet
- 6. 7th planet
- 7. 1st planet
- 8. a piece of ice in space
- 10. some stars do this
- 11. 9th planet
- 15. a burning piece of rock falling to earth