Across
- 1. smallest planet in solar system
- 3. the closest galaxy to ours
- 6. name of our galaxy
- 7. is any planet beyond our solar system
- 9. a class of planets unlike any in our solar system – are more massive than Earth
- 10. person work at space
Down
- 2. smallest star in universe
- 4. biggest planet in solar system
- 5. have a ring
- 8. is a large planet mostly composed of helium and/or hydrogen.