The Big Bang Theory Crossword Puzzle

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Across
  1. 2. A point of infinite density where the Big Bang began
  2. 3. The force of attraction between objects with mass
  3. 5. the totality of matter, space, time, and energy
  4. 7. Refers to the large-scale structure of the universe (as in “____ background radiation”).
  5. 8. what the universe continues to do after the Big Bang
  6. 9. Tool used by astronomers to observe distant objects
  7. 11. The scientist who theorized that the universe is expanding
  8. 13. electromagnetic energy that is visible to the eye
  9. 14. A system of stars, gas, and dust bound together by gravity
Down
  1. 1. Energy that moves in waves or particles; leftover from the Big Bang.
  2. 4. Evidence for the universe expanding; shift of light toward longer wavelengths.
  3. 6. Luminous spheres of plasma held together by gravity.
  4. 7. The theory that the universe expands but will then contract into a small mass and then expand again in another "big bang"
  5. 10. The theory that the universe will continue to cool and expand
  6. 12. Theory that the universe began from a hot, dense state and has been expanding.