Across
- 3. the smallest planet in the solar system
- 5. the hottest planet in the solar system
- 8. a small rocky body which orbits the sun
- 9. the eighth planet from the sun
Down
- 1. the outer atmosphere of a star
- 2. leftovers from the creation of our solar system, consisting of sand, ice and carbon dioxide
- 4. a collection of many stars held together by gravity
- 5. an empty space with no matter
- 6. also known as the Dog Star
- 7. Earth’s only permanent natural satellite