Zoe, Third Period

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Across
  1. 4. apparent shift
  2. 6. collapsed neutron star no light escapes
  3. 8. tells us galaxies are moving away
  4. 10. cloud of gas and dust
  5. 11. start of expansion
  6. 13. squeezing atoms together
  7. 14. warm rises, cool sinks
  8. 15. six trillion miles
Down
  1. 1. cooler areas on sun’s surface
  2. 2. bright center of a galaxy
  3. 3. fusion of H2 and HEE-HEE
  4. 5. hottest layer of atmosphere
  5. 6. the raisins move as bread expands
  6. 7. stream of charge particles
  7. 9. loop of gas
  8. 12. star collapsed core of a high mass star