Out of This World Crossword!!

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Across
  1. 3. 7th Planet
  2. 7. 4th Planet
  3. 8. 3rd Planet
  4. 9. 5th Planet
Down
  1. 1. 2nd Planet
  2. 2. Dwarf Planet
  3. 4. 8th Planet
  4. 5. 6th Planet
  5. 6. 1st Planet