Across
- 4. A measurement from the earth the the sun
- 6. the center of the planets
- 7. a planet that comes together with other plants to form a new planet
- 9. various gases, can condense into liquid
- 10. A plane curve
Down
- 1. gas giants
- 2. clouds surrounding planets
- 3. A motion of a planent in a opposite direction.
- 5. A curve or orbit
- 8. something that separates planets