crossword list.

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Across
  1. 4. galaxy that only has a few million to billion stars
  2. 5. the creation of the universe
  3. 7. gravity shrinks the stars core to a white ball
  4. 10. explosion from when a star collapses in on itself
  5. 11. two stars orbiting each other
  6. 12. a large red colored star
  7. 13. our galaxy
  8. 14. thing so dense that light cannot escape it
  9. 15. biggest group of stars
Down
  1. 1. change in frequency of a wave
  2. 2. mater we cant see but know is there
  3. 3. study of the universe
  4. 6. group of stars
  5. 8. makes up 71%of energy in the universe
  6. 9. egg shaped galaxy