Across
- 3. An imaginary line going through spheres north and south poles
- 5. When an object travels around each other
- 7. person who studies the sky
- 8. A device used to make distance objects appear much closer
- 10. Theory that the Earth was the center of the universe
- 11. A planets spin on its axis
Down
- 1. Force that pulls objects to the center of Earth, other planets, or other moons
- 2. Theory that says the sun is the center of solar system
- 3. the study of space beyond our atmosphere
- 4. path of an object around another object in space
- 6. A hole in the surface of a planet or moon caused from a rock from space hitting the surface
- 9. Everything in space as a whole