Pluto Puzzles

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Across
  1. 4. This moon is named after the ferryman who brought new souls to the Underworld.
  2. 6. Charon is half the size of ____.
  3. 8. This moon is named after a many-headed monster that can regrow two heads for every one lost.
  4. 12. Pluto's atmosphere ____ closer to the sun.
  5. 14. Icy cloud around solar system
  6. 15. Pluto's atmosphere ____ further from the sun.
  7. 19. Charon was discovered by astronomer ____.
  8. 20. Pluto's orbit is tilted ____ degrees.
  9. 21. Pluto's atmosphere is made of mainly ____ and ____ gases.
  10. 22. 4th officially recognized dwarf planet.
  11. 25. Pluto's orbit is more ___ than the other planets.
  12. 26. Pluto is a ____ planet.
  13. 27. Ring of dwarf planets, moons and comets past Neptune
  14. 28. Nix and Hydra were discovered by a ___ space telescope team.
  15. 29. This moon is named after the river that separates the Underworld and the world of the living.
  16. 30. Pluto was demoted in 200_ (Spell it out).
Down
  1. 1. Pluto was demoted because it did not clear its ____.
  2. 2. Charon is ____ locked onto Pluto.
  3. 3. 3rd officially recognized dwarf planet.
  4. 5. 5th officially recognized dwarf planet.
  5. 6. If Earth is a nickel, Pluto is a ____.
  6. 7. Nix orbits around Pluto every ____ days.
  7. 9. Direction of Pluto's rotation
  8. 10. Pluto is half the width of the ____.
  9. 11. Pluto was discovered in 1930 by astronomer ____.
  10. 13. The naming system of Pluto and its moons was begun by a young girl named ____.
  11. 16. Pluto’s surface area is almost equal to that of ____.
  12. 17. 2nd officially recognized dwarf planet.
  13. 18. This moon is named after the goddess of the night.
  14. 23. This moon is named after the three-headed canine guardian of the Underworld.
  15. 24. Greek god of the Underworld
  16. 27. Pluto’s average temperature is 37 ____ (the unit).