Amber 4th

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Across
  1. 1. supposedly the start of expansion
  2. 3. squeezing atoms together
  3. 7. fusion of H and He
  4. 10. bright center of distant galaxies
  5. 13. apparent shift
  6. 14. stream of charged particles
  7. 15. warm goes up cool goes down
  8. 16. 9 trillion miles
Down
  1. 1. raisins spread apart as the bread dough rises
  2. 2. hottest layer of atmosphere
  3. 4. no shape to the galaxy
  4. 5. cloud of gas and dust
  5. 6. collapsed core of a high mass star
  6. 8. oval shaped galaxies
  7. 9. loop of gas
  8. 11. collapsed neutron star, no light escapes
  9. 12. cooler area on surface
  10. 14. spiral shaped galaxies