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Across
  1. 2. The number of quark types that are known to exist.
  2. 5. The nuclear process that stars use to generate energy.
  3. 6. The phenomena that is (theorized) to explain the expansion of the universe.
  4. 8. The imaginary line that Earth rotates on, running from the North Pole to the South Pole.
  5. 9. The theory that describes the beginning of the universe from a singularity, followed by rapid expansion.
Down
  1. 1. Phenomenon where time slows as an object approaches the speed of light.
  2. 3. The element at which the process which stars use to generate energy stops.
  3. 4. The type of radiation that was released at the beginning of the universe
  4. 7. Phenomenon for change in wavelength of light that's far from the observer.