universe vocabulary

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Across
  1. 2. galaxys that are not spiral or elliptical
  2. 5. groups of a thousand stars that are loosley held together by gravity
  3. 7. two stars orbiting each other
  4. 9. the left over material in the core after the super nova explosion
  5. 10. all of the stars galaxys gas and dust
  6. 12. a large red colored star that is calapsing inward
  7. 13. a violent explosion that occurs when a stars core succumbs
  8. 14. nuclie of two atoms combined to form a new atom
  9. 15. tens of thousands of stars that are held togehter by gravity
  10. 17. ball of blowing gas
  11. 21. matter we cant see but know exists
  12. 22. this is so dense that even light can escape the gravity
  13. 23. a galaxy that only contains a few million stars
  14. 25. arms that spiral outward off spiral galaxys
  15. 28. appears as a rotating disk of stars and dust
  16. 29. most widely accepted cosmological explanation of how the universe is formed
Down
  1. 1. gravitational collapses shrinks the stars core to a white glowing core
  2. 3. the shift of absortion bans tworads the red end of a spectrum
  3. 4. method of measurment for stars that are close to earth
  4. 6. nuculear fusion in a stars core produces helium from hydrogen
  5. 8. change in frequency of a wave relative to an observer moving in relationship to the source of a wave
  6. 11. stars that are grouped closely together
  7. 16. groups of hundreds or thousands of stars
  8. 18. egg shaped rotating galaxy
  9. 19. hypothetical form of energy, may make up as much as 71 percent of the energy in the universe
  10. 20. the study of the universe
  11. 24. a group of stars
  12. 26. our galaxy
  13. 27. biggest group of stars