The Outer Solar System

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Across
  1. 3. discovered Uranus by chance
  2. 5. dusty pieces of gas and rock
  3. 7. the second largest planet in our solar system
  4. 9. Saturn's moon that is larger than Mercury
  5. 10. what kind of planets are Jupiter, Saturn, Uranus and Neptune
Down
  1. 1. the largest planet in our Solar System
  2. 2. planet discovered by chance
  3. 4. the largest storm on Jupiter
  4. 6. Jupiter's moon that has a salt-water ocean
  5. 8. a disk made of very small particles of rock and ice