Across
- 3. The theory that the Sun is the center of the solar system
- 6. a device to make distant objects look closer
- 9. Someone who studies space
- 10. Everything in space
- 11. The study of space
- 12. The theory that the Earth is the center of the universe
Down
- 1. When an object travels around another object
- 2. The path of an object around another
- 4. An imaginary line going up and down through a planet
- 5. A force that pulls objects down
- 7. A hole in the surface of a planet or moon
- 8. A planet spins on its axis