Across
- 2. its made up of gas, dust, and stars
- 3. it circulates around the planets
- 5. a person that lives and works in space
- 7. the coldest planet
- 9. the biggest planet
- 10. the place where the planets live
Down
- 1. ours is the only one that can sustain life
- 4. small icy object that orbit the sun with a tail
- 6. they orbit the sun but are much smaller than planets
- 8. the red planet