Solar System

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Across
  1. 4. Discovery caused the demotion of Pluto
  2. 7. Has the fastest winds in the Solar System
  3. 12. Least dense major moon
  4. 14. Has the smoothest known surface
  5. 15. Planet with coldest average temperature
  6. 16. Planet with the most eccentric orbit
  7. 17. Most heavily cratered object
  8. 18. Largest object with a retrograde orbit
  9. 22. Largest irregular shaped moon
  10. 26. Edge of solar system
  11. 29. Potential dwarf planet with a highly elliptical orbit
  12. 30. One of Saturn’s moons, it’s the smallest spherical body
  13. 33. Creates ones of Saturn’s rings
  14. 34. Square shaped moon
  15. 35. Moon that is half the size of the object it orbits
  16. 36. Comprised 92% of hydrogen
  17. 37. Hypothetical planet beyond Neptune
  18. 38. Planet with the largest magnetic field
Down
  1. 1. First object to be named an asteroid
  2. 2. Closest star to the Sun
  3. 3. Planet with the highest light reflectivity
  4. 5. Object expected to spiral away from Mars
  5. 6. Hypothetical moon of Venus
  6. 8. Only moon with a thick atmosphere
  7. 9. Least dense planet
  8. 10. Object with an orbit that crosses paths with Neptune’s
  9. 11. One of the moons most distant from it’s planet
  10. 13. Only moon with a significant magnetosphere
  11. 19. Object expected to be destroyed by Mars
  12. 20. The most geologically active object
  13. 21. Second largest moon of Uranus
  14. 23. Object with wildly varying albedos
  15. 24. Has four hour long days
  16. 25. Most dense planet
  17. 27. Largest moon in the inner solar system
  18. 28. Hypothetical planet that impacted Earth
  19. 30. Has the biggest volcano in the Solar System
  20. 31. Third fastest object in the Solar System
  21. 32. Also named the “Easter Bunny”