Solar System

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Across
  1. 3. All alone in the outer reaches
  2. 4. The coldest of the 8
  3. 6. The biggest of the 8
  4. 8. The smallest of the 8
Down
  1. 1. The most beautiful of them all
  2. 2. The hottest of the 8
  3. 5. The big, blue, and mean
  4. 7. We all live here
  5. 8. Red, little, cold