Wes 8

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Across
  1. 5. Loop of gas
  2. 6. stream of changed particles
  3. 9. fusion of Hydrogen and Helium
  4. 10. squeezing atoms together
  5. 12. The raisins spread apart as the bread rises.
  6. 13. cooler areas on surface
  7. 14. everywhere stars young or old in an oval shape
  8. 16. bright center of a distant galaxy
  9. 17. 9 trillion miles
  10. 18. scattered
Down
  1. 1. tells us galaxies are moving away
  2. 2. collapsed neutron star, no light escapes
  3. 3. apparent shift
  4. 4. collapsed core of a high mass star
  5. 7. warm rises, cool sinks
  6. 8. hottest layer of atmosphere
  7. 11. clouds of gas and dust
  8. 13. Young stars in the arms, Old stars in the middle
  9. 15. start of expansion