Across
- 3. Asteroid headed towards earth
- 5. rock floating through space
- 8. orbit a star
- 9. someone who studies space
- 11. planets orbit a sun
- 12. big ball of hot gas
- 13. what keeps us on the ground
- 14. scientist who studies planets
Down
- 1. some planets have more than one
- 2. path around a sun
- 4. objects motion in orbit around something
- 6. where there are planets, stars,more
- 7. what we live on
- 10. Company that studies space