Universe crossword

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Across
  1. 5. large ball of hot gas
  2. 6. group of stars that for patterns
  3. 7. only planet capable for human life
  4. 9. largest planet
  5. 10. second smallest planet
Down
  1. 1. closest planet to the sun
  2. 2. center of the solar system
  3. 3. there are eight of them
  4. 4. everything within and between all galaxies
  5. 8. shape of most galaxies