Stars and galaxies

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Across
  1. 3. what does earth rotate on?
  2. 5. hottest planet in our solar system
  3. 6. 8th planet to sun
  4. 8. cloud of dust and gas occupying the space between stars and acting as a nursery for new stars
  5. 11. closest planet to sun
  6. 13. how many planets are there in our galaxy?
  7. 17. how many layers are there on the sun
  8. 18. group of stars in a picture
  9. 19. 7th planet to sun
Down
  1. 1. how many types of galaxy's are there?
  2. 2. 4th planet to sun
  3. 4. 5th planet to sun
  4. 5. 2nd planet to sun
  5. 7. 3rd planet to sun
  6. 9. what color is a hot star
  7. 10. coldest planet in our solar system
  8. 11. what galaxy do we live in?
  9. 12. what color is the sun
  10. 14. what is something in our sun
  11. 15. 6th planet to sun
  12. 16. what color is cool star?