Solar System

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