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