space crossword

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Across
  1. 4. closest planet to the sun
  2. 5. large spherical object that orbits a star
  3. 9. planet that orbits on its axis
  4. 10. large desert of dust
  5. 11. object that orbits a planet
  6. 13. burning ball of gas
Down
  1. 1. hole large dense vacuum
  2. 2. farthest planet from the sun
  3. 3. hottest planet
  4. 6. ecosystem of stars
  5. 7. largest planet in our solar system
  6. 8. giant planet with no surface
  7. 12. only inhabitable planet