Across
- 2. only planet that can sustain life
- 4. Largest planet
- 5. A group of billions of stars forming one system
- 6. one of neptunes moons
- 9. has 13 moons
- 10. body that revolves around the earth
Down
- 1. has no atmosphere
- 3. A stone or metal massd that has entered earth from space
- 7. only planet that is less dense than water
- 8. Important star needed to sustain life on earth