Across
- 2. The dark, smooth "seas" on the surface of the moon
- 6. Another name for the inner planets, meaning "Earth-like"
- 10. Rocky or metallic objects of irregular shape
- 11. This planet rotates on an axis sideways to other planets
- 12. Largest Dwarf planet in the solar system
- 14. This planets has the densest atmosphere abundant in carbon dioxide
- 17. Kuiper belt dwarf that was once classified as a planet
- 18. Dusty snowball
Down
- 1. This planet has a potato-shaped moon in between its rings
- 3. Pieces of space material impact with Earth
- 4. This planet has longer days than years.
- 5. This is the densest planet in the solar system
- 7. Earth's natural satellite
- 8. This planet is home to the largest volcano in the solar system
- 9. The largest object in the asteroid belt
- 13. This planet has the strongest winds
- 15. This planet has the fastest rotation
- 16. Another name for the outer planets, meaning "Jupiter-like"