Across
- 4. home to 7 billion
- 5. the gravitation of the solar system
- 7. seventh planet from the sun
- 9. the oldest planet
- 10. the tilted planet
- 11. is the only planet in our solar system not visible to the naked eye
- 12. most investigated planet
Down
- 1. is the hottest planet in our solar system
- 2. smallest planet
- 3. our space neighborhood
- 6. everything in space
- 8. a pulling force