Across
- 2. alternate name for Earth's moon
- 5. William ___________. Discovered Uranus
- 10. Saturn's moon with liquid water geysers
- 12. planet with Olympus Mons
- 14. discovered the four largest moons of Jupiter
- 15. what Io has the most of in the S.S.
- 17. First person to identify the rings of Saturn
- 18. planet with largest core relative to its volume
- 20. dwarf planet that rotates so fast its the shape of an egg
- 21. main chemical in Mars' atmosphere
- 23. Planned NASA probe that will fly on Titan
- 24. Planet tilted on its side
- 28. Largest dwarf planet
- 31. Gonggong is named after one of this culture's gods
- 32. probe that left the S.S. in 2012
- 33. shape of Saturn's polar storm
Down
- 1. only planet with liquid H2O
- 3. moon that was once a dwarf planet
- 4. Gas giant with the great dark spot
- 6. hottest planet in the solar system
- 7. gas giant with large icy rings
- 8. fifth planet from the Sun
- 9. Eris's moon
- 11. Uranus' moons are named after characters from this author's plays
- 13. moon with liquid methane lakes and rivers
- 16. farthest position of an orbiting body from the Sun
- 19. largest moon
- 22. only probe to reach Uranus and Neptune
- 25. belt between mars and jupiter
- 26. probe on it's way to Europa to search for life in its subsurface oceans
- 27. belt beyond Neptune
- 29. Pluto's only moon
- 30. moon of Saturn that is almost entirely made of water-ice