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