The Big Bang Theory

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Across
  1. 3. The Catholic priest who proposed the idea of a once-small universe
  2. 4. A scientific explanation for observations of the natural world
  3. 8. An orbiting telescope named after the astronomer who found evidence of an expanding universe
  4. 10. The second most abundant element in the universe
  5. 11. the apparent change of wavelength in light from an object that moves away from an observer
  6. 12. Most ordinary matter is this element
Down
  1. 1. This kind of radiation is detectable everywhere we look in space
  2. 2. the distance light travels in one year
  3. 5. getting bigger
  4. 6. Redshift is measured by looking at the _________ of stars
  5. 7. The combination of substances a thing is made of
  6. 9. radiation still detectable from the early universe