Briah 8

12345678910111213141516171819
Across
  1. 5. Hottest layer of atmosphere
  2. 6. Bright center of a distant galaxy
  3. 7. apparent shift
  4. 8. stream of charged particles
  5. 9. loop of gas
  6. 10. Young stars in the arms old stars in the center
  7. 12. cloud of gas and dust
  8. 13. cooler areas in surface
  9. 14. collapsed core of a high mass star
  10. 17. smallest galaxy
  11. 18. warm rises cool sinks
  12. 19. 9 trillion miles
Down
  1. 1. Squeezing atoms together
  2. 2. start of expansion
  3. 3. tells us galaxies are moving away
  4. 4. the raisins spread apart s the bread rises
  5. 11. Fusion of H2 and He
  6. 15. All old stars
  7. 16. collapsed neutron star no light escapes