Earth moon sun and solar system

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Across
  1. 3. what killed the dinosaurs
  2. 4. can see trough a telescope made of fire (not sun)
  3. 7. the smallest planet in our solar system and nearest to the Sun
  4. 9. the fourth planet from the Sun
  5. 10. space rock
  6. 12. a lot of rings
  7. 15. technology in space that takes photos
  8. 17. the largest planet
  9. 18. many solar systems inside
Down
  1. 1. exploded star.
  2. 2. one of two ice giants in the outer solar system
  3. 4. where everything is not on earth
  4. 5. the second planet from the Sun
  5. 6. what the moon dose around earth
  6. 8. where we live.
  7. 11. asteroid or space ____
  8. 12. the center of the solar system
  9. 13. is the eighth and most distant planet from the Sun
  10. 14. around Saturn
  11. 16. way the most known galaxy