SCI INVEST FINAL REVIEW

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Across
  1. 2. Cloud of gas and dust where stars are formed
  2. 5. Type of galaxy with arms that wind outward from the center
  3. 6. Radiation left over from the early universe that supports the Big Bang Theory
  4. 9. Change in wavelength showing that an object in space is moving away from Earth
  5. 11. Process by which stars are created from collapsing gas and dust
  6. 12. Theory that explains the origin and expansion of the universe
  7. 14. Extremely hot, dense state of the universe at the beginning of time
  8. 15. Force that pulls matter together and allows stars and galaxies to form
Down
  1. 1. Object with gravity so strong that not even light can escape
  2. 3. Process that powers stars by combining hydrogen atoms into helium
  3. 4. The stretching of space as the universe grows larger over time
  4. 7. Change in wavelength showing that an object in space is moving toward Earth
  5. 8. Early stage of a forming star before nuclear fusion begins
  6. 10. Most abundant element in the early universe and the main fuel of stars
  7. 13. Large system of stars, gas, and dust held together by gravity