Across
- 2. A small reddish planet that is fourth from the Sun
- 4. The smallest plane in our solar system and the closet to the Sun
- 7. An irregulary shaped rock that orbits the Sun
- 8. A large planet that is mainly made up of gases
- 12. A single turn of something around an axis or a fixed point;spinning
- 13. The center of an object
- 14. Earth's only natural satellite
- 16. A large blue planet that is eighth from the Sun
- 17. The largest planet in our system and the fifth from the Sun
- 18. The are in space between Mars and Jupiter where most asteroids orbit together
- 21. An are of our solar system beyond the orbit of Neptune where a group of minor planets and other objects orbit the Sun
- 22. The third planet from the Sun
- 23. system A group of objects in space that orbit a Star
- 24. A dwarf planet that was discovered in 1930 and was once considered a planet
- 25. A single journey along an orbital path
Down
- 1. A nearly rounded object that orbits, a star, and not big enough to be a planet
- 3. A space object made of ice and dust that orbits a star and develops a long, bright tail as it nears its star
- 5. A large bluish-green planet that is seventh from the Sun
- 6. A planet with large rings around it that is sixth from the Sun
- 9. A layer of gases surrounding a planet star, or moon
- 10. A body in outer space made of hot gasses
- 11. The force that pulls all objects toward each other
- 15. A hole in the ground caused by the impact of an object from space
- 19. This means to revolve around another object
- 20. planets Rocky Earth sized planets