Payge8

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