The planets

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Across
  1. 3. of planets
  2. 5. to the sun
  3. 6. the light the sun
  4. 7. planets
  5. 9. planet
Down
  1. 1. to be a planets
  2. 2. of light
  3. 4. it takes earth to revolve around the sun
  4. 6. planet
  5. 8. with least density