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Across
  1. 2. our home planet
  2. 3. closest star
  3. 6. the hottest planet
  4. 7. natural satellite
  5. 9. the biggest planet
Down
  1. 1. ringed outer planet
  2. 4. the coldest planet
  3. 5. the closest to the sun
  4. 7. known as the red planet
  5. 8. farthest planet from the sun