Across
- 4. a hole on the surface the moon or a planet
- 5. the study of space and beyond our atmosphere
- 8. an object used to make objects appear closer
- 10. theory that the earth was the center of the universe
- 12. theory that the sun is the center of the solar system
Down
- 1. everything in space as a whole
- 2. a force that pulls an object the center of the earth
- 3. person who studies space
- 6. a planets spin on its axis
- 7. when an object travels around another
- 9. the path of an object around another object
- 11. an imaginary line going through center of a sphere north and south pole