darrous bon qui qui the 3rd

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Across
  1. 3. collapsed core of a high mass star
  2. 8. young stars
  3. 10. hottest layer of atmosphere
  4. 12. old stars
  5. 14. stream of charged particles
  6. 15. tells us galaxies are moving away
  7. 18. loop of gas
  8. 19. cooler areas on surface
Down
  1. 1. fusion of h2 and he
  2. 2. young in the arms and old in the center
  3. 4. start of expansion
  4. 5. bright center of a distant galaxy
  5. 6. cloud of gas and dust
  6. 7. the rasins spread apart as the bread rises
  7. 9. collapsed neutron no light escapes
  8. 11. apparent shift
  9. 13. 6 trillion miles
  10. 16. squeezing atoms together
  11. 17. warm rises cool sinks