The planets

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Across
  1. 2. with least density
  2. 4. farthest planet from the sun
  3. 5. planet
  4. 7. planet
  5. 8. plant
  6. 10. all planets do around the sun
Down
  1. 1. with life
  2. 3. of light
  3. 6. the light the sun
  4. 9. keeps the planets in orbit