Across
- 4. An invisible line that goes through the north and south poles
- 6. A devise to make distant thing such as stars appear much closer
- 9. All planets,moons,and other celestial objects as a whole
- 10. when an object travels around another
- 11. Studies of space beyond earth
- 12. A planet or moon spinning around its axis
Down
- 1. A hole caused by a rock hitting the surface of a planet or moon
- 2. An invisible force pulling objects made of matter towards the surface of a planet or moon
- 3. A person who studies planets,moons,stars,and other galaxies
- 5. A theory in which the earth is the center of the universe
- 7. The path around a sphere on which another follows
- 8. A theory in which our sun is the center of the solar system