Planetary Moons

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Across
  1. 2. moon of Saturn with erupting geysers
  2. 4. heavily cratered moon of Jupiter
  3. 7. has the most active volcanoes in the solar system
  4. 8. larger of Mars' 2 moons
  5. 9. moon of Saturn with an atmosphere
  6. 10. spacecraft that discovered Jupiter's rings
  7. 13. moon of Uranus with interesting geologic activity
  8. 14. common balance point
Down
  1. 1. discovered the 4 main moons of Jupiter
  2. 2. ice-covered moon with possible water underneath
  3. 3. smaller of Mars' 2 moons
  4. 5. only moon in the solar system with retrograde motion
  5. 6. Pluto's largest moon
  6. 11. spacecraft that studied Saturn and its moons
  7. 12. the largest moon in the solar system