Across
- 2. The only planet that is named after a Greek god
- 5. Made from ice, dust and rocks
- 7. A planet covered in rust
- 8. The study of everything in the universe
- 9. Flaming rocks that sometimes crash into planets
Down
- 1. The planet furthest from the sun
- 3. First person to the moon
- 4. When the sun cover the moon and the other way around too
- 6. Largest known star so far