Big Bang Theory

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Across
  1. 3. An apparatus for photographing spectra.
  2. 4. All matter and space that exists.
  3. 5. A theory of the creation of the universe.
  4. 7. The segment of electromagnetic spectrum that is visible to the human eye.
  5. 8. Space and the physical universe.
  6. 9. What was left over from the Big Bang.
  7. 10. What is light measured with.
Down
  1. 1. Wavelengths that shorter when closer.
  2. 2. The particles when the universe was created.
  3. 6. Proof that space is expanding.