Across
- 2. a system of millions or billions of stars held
- 4. a meteoroid that has hit earths surface
- 8. Planets a name given to the four inner planets
- 9. by gravitation attraction
- 10. space.
- 11. A description of the solar system in which the planets revolve around the sun.
- 12. a ball of ice and dust is usually a long narrow
Down
- 1. any object that revolves around other object
- 3. a scientist who studies the universe beyond
- 5. the study of the moon stars and other objects in
- 6. a chunk of rock or dust in space
- 7. the path of an object revolves around another