Space

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Across
  1. 1. the sixth planet
  2. 4. not sure if its a planet
  3. 5. the seventh planet
  4. 7. the first planet
  5. 9. the second planet
Down
  1. 2. the eighth planet
  2. 3. the third planet
  3. 6. the fifth planet
  4. 8. the fourth planet