Across
- 2. a mass that moves around the sun
- 4. a shape with five points
- 6. a being from Mars
- 7. an important job
- 9. someone who travels to places no one has been
- 10. works in science
- 11. a large group of stars
- 12. all the planets and galaxies
Down
- 1. fourth planet from the sun
- 3. gases that surrounds a planet
- 5. from another world
- 8. galaxy earth is in
- 10. a vehicle used for travel in space