Across
- 2. A hole in the surface of a planet or moon caused by a rock from space hitting the surface.
- 5. A force that pulls objects towards the center of the earth, other planets or moons
- 9. A device used to make distant objects appear much closer.
- 10. The path of an object around another object in space
- 11. Everything in space as a whole
- 12. The study of space beyond our atmosphere.
Down
- 1. takes 1 year to complete a revolution around the sun
- 3. When an object travels around another
- 4. A planet spin on its axis Earth takes 1 day to complete a full rotation
- 6. Theory that states the sun is the center of the solar system.
- 7. Theory that the earth was the center of the universe.
- 8. A person who study space.
- 12. An imaginary line going through the center of a sphere north and south poles.