The Solar System

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Across
  1. 3. Planet closest to the Sun
  2. 5. Provides almost all energy in the Solar System
  3. 6. Moon of Jupiter made of ice and ocean under ice
  4. 8. Gas in atmosphere of Uranus and Neptune
  5. 10. Space probe that does not stop at a planet
  6. 11. Space probe to all four outer planets
  7. 12. Important gas that makes up atmosphere of all four outer planets
  8. 14. Surfaces of inner planets
Down
  1. 1. Cloud of material from older star that exploded
  2. 2. The largest planet
  3. 4. Solar System "leftovers" made of ice and rock
  4. 7. Caused material from solar nebula to clump together and form planets
  5. 9. Solar System "leftovers" made of rock
  6. 10. Number of inner planets
  7. 11. Hottest planet because of greenhouse effect
  8. 13. Another important gas in all four outer planets