Planets and Moons of the Solar System!

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Across
  1. 6. A vast, spherical shell of icy objects that marks the outermost edge of the solar system.
  2. 8. Ice giant that rotates on its side, with faint rings and 27 discovered moons.
  3. 10. A Mars-sized planet that collided with early Earth, creating the Moon and giving Earth its axial tilt.
  4. 16. A hypothetical distant planet beyond Neptune with an extremely wide orbit, possibly 600 AU or more from the Sun.
  5. 17. A distant zone beyond Neptune containing icy bodies, dwarf planets like Pluto, and comets.
  6. 21. One of the largest asteroids in the asteroid belt, nearly a dwarf planet.
  7. 22. An icy moon of Jupiter that may have a subsurface ocean.
  8. 23. The largest object in the asteroid belt, classified as a dwarf planet.
  9. 24. Hottest planet with a thick, toxic atmosphere and runaway greenhouse effect.
  10. 26. A protoplanet that collided with Uranus, causing its extreme 98-degree axial tilt.
  11. 27. A theorized former planet between Mars and Jupiter whose destruction may have formed the asteroid belt.
  12. 29. Gas giant known for its spectacular ring system featuring rings A, B, C, D, E, F, and G.
  13. 30. A tiny moon with two distinct lobes, resembling a peanut. Also likely to be a contact binary and is one of Pluto's five moons.
  14. 34. Largest moon of Uranus, icy and heavily cratered.
  15. 35. A hypothetical giant planet thought to reside in the distant Oort Cloud, possibly a cold gas giant.
  16. 36. The outer boundary of the heliosphere where the solar wind meets interstellar space.
  17. 37. Earth's only natural satellite, also called the Moon.
  18. 39. Icy moon of Saturn with water geysers and possible subsurface ocean.
Down
  1. 1. A heavily cratered moon of Jupiter, ancient and geologically inactive.
  2. 2. Dwarf planet with icy plains and a heart-shaped region. Also has five moons.
  3. 3. The star at the center of our solar system, source of light and heat. Normally called the Sun
  4. 4. Pluto’s largest moon, nearly half its size, forming a double system.
  5. 5. Jupiter’s largest moon and the biggest moon in the solar system. Also bigger than Mercury.
  6. 7. Neptune’s largest moon, with geysers and a retrograde orbit.
  7. 9. The smallest planet and closest to Helios.
  8. 11. A dark, icy moon of Uranus, covered in craters and mysterious bright ring-shaped features.
  9. 12. A newly hypothesized dwarf planet that is another suspect of asteroid belt formation.
  10. 13. The farthest major planet, deep blue and very windy.
  11. 14. The outermost and largest of Pluto’s small moons, oddly shaped.
  12. 15. Small moon of Saturn with a huge crater resembling the Death Star. Also smallest spherical object in the solar system.
  13. 18. A region between Mars and Jupiter filled with rocky bodies, including Ceres, Vesta, and many smaller asteroids.
  14. 19. A small asteroid with a bright surface and a big impact crater (at least when compared to the asteroid's size).
  15. 20. Jupiter’s volcanic moon, the most geologically active body in the solar system.
  16. 21. The bubble-like region of space shaped by the solar wind, enclosing the entire solar system.
  17. 25. Another name for Earth, the only known planet with life.
  18. 28. Neptune’s second-largest moon, irregularly shaped and dark.
  19. 31. The smallest and innermost of Pluto’s moons, with a chaotic rotation.
  20. 32. Saturn’s largest moon, with thick atmosphere and liquid methane lakes. Also bigger than Mercury.
  21. 33. The Orange Planet, known for its dusty surface and potential past water.
  22. 38. A small, irregular moon with a bright, reflective surface. One of Pluto's five moons.