Across
- 4. layer of air around the earth
- 5. the only planet which has water on it
- 6. natural satellite of the earth
- 7. the meaning of the term planets
- 8. the galaxy which contains our solar system
Down
- 1. a group of stars that form a pattern
- 2. movement of planets on their own axis
- 3. planet which takes the longest time to complete one rotation