Chapter 13

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Across
  1. 3. Nothing can escape from it
  2. 4. Areas of the sun that are cooler than others
  3. 6. Formed by heavier and heavier elements
  4. 8. distance that light travels in one year
Down
  1. 1. Creation of the universe
  2. 2. What stars begin as
  3. 5. All light comes out of a star
  4. 7. Groups of stars gas and dust