Fall

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Across
  1. 3. used to be called a planet but it is too small
  2. 6. the next planet humans want to colonize (live on)
  3. 8. an exploding star
  4. 10. the third rock from the sun
  5. 12. a group of stars
Down
  1. 1. largest planet in our solar system
  2. 2. a body of space clouds
  3. 4. the planet with the funniest name
  4. 5. a region of space with such gravitational force nothing can escape it
  5. 7. planet with ring around it
  6. 9. 2nd closest planet to sun
  7. 11. a metal that is liquid at room temperature
  8. 13. the King of the sea in Spongebob