Planet puzzle!!!

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Across
  1. 2. Nicknamed The Great Red Spot
  2. 5. Nicknamed Guardian of the Deep
  3. 8. Has an abundance of Iron
Down
  1. 1. Closest to the sun
  2. 3. Has thirteen ice rings
  3. 4. Earths sister planet
  4. 6. Dwarf Planet
  5. 7. Has over sixty moons