Across
- 3. Most volcanically active object in the Solar System
- 5. Largest moon in the Solar System
- 8. Largest of the ice planets
- 9. Innermost terrestrial planet
- 10. Has very active jets of water ice erupting from its south pole
- 12. Only moon with a substantial atmosphere
Down
- 1. King of the planets
- 2. Hottest planet in the Solar System
- 4. Second largest and least dense planet in the Solar System
- 6. Smoothest moon in the Solar System due to its active ice crust.
- 7. Largest terrestrial planet
- 9. Closest planet to the Earth
- 11. Furthest planet from the Sun