Inner and Outer planets

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Across
  1. 2. the second planet from the Sun
  2. 4. the sixth planet from the Sun and the second-largest in the Solar System, after Jupiter
  3. 6. Earth,Mars,Venus,Mercury
  4. 8. Jupiter,Saturn,Uranus,Neptune
  5. 9. the first planet from the Sun and the smallest in the Solar System
  6. 10. the third planet from the Sun
Down
  1. 1. the fifth planet from the Sun and the largest in the Solar System
  2. 3. the fourth planet from the Sun
  3. 5. the seventh planet from the Sun
  4. 7. the eighth and farthest known planet from the Sun