Solar System (Hard Mode)

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Across
  1. 5. Ha ha very funny...
  2. 7. Oldest object
  3. 11. a reddish dwarf planet
  4. 17. SALTY
  5. 18. Could have a subsurface ocean
  6. 19. its interior is expanding
  7. 23. Inclined orbit
  8. 24. has the building blocks for life
  9. 25. Never forgotten... (1930-2006)
  10. 26. it's a song with... questionable lyrics...
  11. 27. Cracked all over
  12. 29. AAAAAAAAAAAAAAAAAAAAAAA!!!!
  13. 30. orbits backwards
  14. 31. Very dark
  15. 34. Possible rings
  16. 35. Just gonna stand there and watch me burn
  17. 36. DEATH STAR MOON
Down
  1. 1. Two toned surface
  2. 2. the planetesimal asteroid
  3. 3. Caused the worst demotion in history!
  4. 4. O V A L
  5. 6. Not actually as blue as you thought
  6. 8. MAGNETIC TORNADOES!?
  7. 9. filled with rayed pits
  8. 10. Weirdly Spherical
  9. 12. Very Bright!
  10. 13. Evidence of past life Found!
  11. 14. S Q U A R E
  12. 15. Has a magnetic field of its own
  13. 16. Its storm is shrinking
  14. 19. has liquid on its surface
  15. 20. Polar hexagon
  16. 21. makes a double system with its partner
  17. 22. Very much reflective
  18. 28. actually has an atmosphere
  19. 32. its RICH in volcanoes
  20. 33. Literally just a rubble pile... thats it..