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Across
  1. 3. dark
  2. 4. bight
  3. 5. Saturn's moon
  4. 6. light cannot escape me.
  5. 8. I'm the smallest planet.
  6. 9. rings
Down
  1. 1. ice giant
  2. 2. the only one with water.
  3. 3. rocks.
  4. 7. Halley
  5. 9. hot