Big Bang and Stars Crosswords

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Across
  1. 2. the distance from the Earth to the Sun, about 93,000,000 miles (_________ unit)
  2. 5. the stretching of a wavelength of radiation emitted by a celestial body that is moving away from an observer as a consequence of the Doppler effect
  3. 8. the apparent displacement of an observed object due to a change in the position of the observer. *used to find the distance to nearby stars. (Two words)
  4. 9. areas of interstellar matter that has a higher density; also known as interstellar clouds.
  5. 11. The compression of a wavelength of radiation emitted by an approaching celestial body as a consequence of the Doppler effect
  6. 14. makes up 70% of the universe, believed to propel the universe to expand, counteracting gravity (two words)
  7. 15. Whose Constant is "Ho" or "H-naught", represents the average expansion of the universe in Hubble's Law
  8. 16. refers to the dramatic growth in the size of the early universe
  9. 17. elements the remaining elements such as, carbon, nickel, and iron, when a black hole loses all energy and force.
  10. 19. makes up 5% of the universe, is everything that we can see (two words)
  11. 21. the process of splitting an atoms nucleus into seperate and sometimes several parts
  12. 22. A branch of astronomy, that studies the universe, how it began, how it evolves, and what it is made of
Down
  1. 1. Hydrogen and Helium, the amount of these gases in the universe is evidence that the Big Bang did occur (__________ Elements)
  2. 3. the distance that light travels in a year (it IS NOT a measurement of time) (two words)
  3. 4. An increase (or decrease) in the frequency of sound, light, or other waves as the source and observer move toward (or away from) each other. (_____ Effect)
  4. 6. makes up 25% of the universe, cannot be seen, but has very strong gravitational effects (two words)
  5. 7. redshift a redshift in the spectra of a galaxy's light because of the expansion of space itself
  6. 10. A Theory that says the universe began as a tiny, hot, and dense collection of matter and radiation that expanded about 13.7 billion years ago (two words)
  7. 12. spots on the Sun that are darker than the rest of the Sun because the temperature in that area is cooler
  8. 13. process where hydrogen nuclei fuse together to produce heluim
  9. 18. What theory says that though the universe is expanding, it is also infinitely old and that the formation of the universe is an ongoing process?
  10. 20. Microwave Background Radiation radiation produced about 400,000 years after the Big Bang occurred that is still streaming across the universe