big bang theory

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Across
  1. 7. big red stars
  2. 8. 75% of the universe
  3. 9. leftovers of the big bang
  4. 10. traces of this element everywhere
Down
  1. 1. the start of the universe
  2. 2. light moving toward
  3. 3. big explosion of a star
  4. 4. light moving away
  5. 5. the measure of light
  6. 6. 25% of the universe