Moons

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Across
  1. 4. Name of the largest moon in the solar system
  2. 6. Phenomenon that causes the same side of the Moon to always be facing Earth (two words)
  3. 8. Planet with the largest moon in the solar system
  4. 9. Outermost planet that has no moons
Down
  1. 1. Name of NASA spacecraft that orbited Saturn
  2. 2. Name of NASA spacecraft currently orbiting Jupiter
  3. 3. Innermost planet that has no moons
  4. 5. Mars' moon named after "fear"
  5. 6. Name of Neptune's largest moon
  6. 7. Mars' moon named after "dread"