Camilo 4th

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Across
  1. 2. collapsed neutron star, no light escapes
  2. 4. squeezing atoms
  3. 7. spiral shaped galaxy
  4. 8. 9 trillion miles
  5. 10. apparent shift
  6. 11. hottest layer
  7. 12. no shape
  8. 16. cloud of gas and dust
  9. 17. warm rises,cool sinks
  10. 18. loop of gas
Down
  1. 1. stream of charged particles
  2. 2. raisins spread as dough rises
  3. 3. collapsed core of a high mass star
  4. 5. start of expansion
  5. 6. tells us galaxies are moving away
  6. 9. fusion of hydrogen and helium
  7. 13. oval shaped
  8. 14. bright center of galaxy
  9. 15. cooler area on surface