Across
- 2. rotates on its side
- 5. the path of an object as it revolves around another object in space
- 6. a system of millions or billions of stars held together by gravitational pull
- 8. a meteoroid that has hit earths surface
- 9. is the hottest planet
- 13. a chunk of rock or dust in space
- 14. has many rings
Down
- 1. is the only planet with liquid water
- 3. is a star at the center of the solar system
- 4. a ball of ice and dust whose orbit is usually a long, narrow ellipse
- 7. a scientist who studies the universe beyond earth
- 10. any object that revolves around another object in space
- 11. is the largest planet
- 12. is the fourth planet from the sun