Astronomy puzzle

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Across
  1. 1. this is everything.
  2. 5. spin slowly in the oppisite dierection from the m
  3. 6. it is a giant cloud of dust and gas in space.
  4. 8. this is also known as the red planet.
  5. 10. it is 4 times wider than the sun
  6. 12. it has billions of stars.
  7. 14. way it has over 200 billion stars.
  8. 15. planet it is about -81degrees F.
  9. 16. you cannot stand on this plaent
  10. 18. this planet is the only planet to host life.
  11. 19. hole you can't directly see it.
  12. 20. it is 4.5billion years old.
Down
  1. 2. system it has 8 planets.
  2. 3. the smallest planet
  3. 4. planets.
  4. 7. this planet has 80 moon.
  5. 9. the smaller it is the longer it lives.
  6. 11. it is the biggest star known.
  7. 13. located about 2.5million light years.
  8. 17. the furthest awy from the sun.
  9. 19. bang it has happen everywhere at once.