Across
- 3. The force that pulls objects toward each other
- 5. A large planetary system that consists of many smaller planetary systems
- 10. the planet that is inhabited by humans
- 11. the 4th planet from the sun
- 14. The name given to the four inner planets
Down
- 1. small rock objects found mainly between Mars and Jupiter
- 2. The four outer planets in the Solar System
- 4. the inner layer of the sun's atmosphere
- 6. Any object that revolves around another object in space
- 7. A collection of ice, dust, and small rocky particles, typically with a long,narrow orbit
- 8. the closest planet to the sun
- 9. the path an object follows as it travels around another object
- 12. the largest planet in our solar system
- 13. the planet with several rings