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