Across
- 4. everything in space as a whole
- 6. the path of an object around another object
- 7. a force that pulls objects towards the earth, other planets, and moons.
- 9. a planet's spin on its axis
- 11. a device used to make distant things look closer
- 12. a person who studies space
Down
- 1. an imaginary line going through the poles of earth
- 2. journey around the sun
- 3. theory that the sun is the center of the solar system
- 5. the study of space
- 8. hole in the surface of a planet or moon caused by a rock from space hitting the surface.
- 10. theory that earth was center of the universe