astronomy

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