astronomy

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Across
  1. 1. the theory on how the universe began
  2. 5. this star has a diameter of about 10 miles
  3. 7. colors of the visible spectrum
  4. 8. how much light the star actually gives off
  5. 11. giant cloud of dust and gas
  6. 13. theory that universe will continue racing outward until everything dies
  7. 14. this type of galaxy has no dust or gas
  8. 16. color of coolest star
  9. 17. name of the galaxy we live in
  10. 18. this size star is 1000x the diameter of the sun
  11. 19. this type of galaxy has a bulge in the middle and arms
  12. 20. color of hottest star
  13. 21. this type of galaxy doesn't have a set shape
Down
  1. 2. a unit of measurement that represents the average distance from the Earth to the sun
  2. 3. light waves that show a shift and serve as evidence that the universe is expanding
  3. 4. energy is spread evenly throughout universe, this is evidence of the big bang theory
  4. 6. what about the universe is repeated over and over?
  5. 9. 96-99% of a stars mass
  6. 10. theory the universe will come back together again and have repeating big bangs
  7. 12. how much light the star appears to give off
  8. 15. year a unit of measurement used outside of the solar system