Big Bang

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Across
  1. 3. Universe is full of them
  2. 4. Discovered CMB
  3. 5. when stars far off look red
  4. 6. lightest member of gas
  5. 7. Beginning of the universe
  6. 8. can be produced by natural gases
  7. 10. Everything
Down
  1. 1. Big bang evidence
  2. 2. when stars closer to you look bluer
  3. 9. Used to study light