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Across
  1. 2. Shift
  2. 5. Density
  3. 7. Forces
  4. 9. Space Telescope
  5. 11. Background Radiation
  6. 12. Matter
Down
  1. 1. Lines
  2. 3. Fireball
  3. 4. Bang Theory
  4. 6. Era
  5. 8. Fusion
  6. 10. Hole