Space words

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Across
  1. 2. what are we on
  2. 5. kwon as the red planet
  3. 6. what earth is in
  4. 7. the biggest planet
  5. 9. between inner and outer planets
Down
  1. 1. kwon to have rings
  2. 3. sometimes kwon as a shooting star
  3. 4. one of the forces
  4. 8. What every planet does