kody.5

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Across
  1. 2. year: 6 million miles.
  2. 4. hole: collapsed neutron star, no light escapes.
  3. 6. wind: stream of changed particles.
  4. 9. warm rises, cool sinks.
  5. 11. cooler areas on surface.
  6. 14. loop of gas.
  7. 15. cloud of gas and dust.
  8. 17. effect: tells us galaxies are moving away.
  9. 18. squeezing atoms together.
Down
  1. 1. galaxy: young.
  2. 3. bright center of a distant galaxy.
  3. 4. dough theory: the raises spread apart as the bread rises.
  4. 5. galaxy: unknown.
  5. 7. sequence: fusion of H, and He.
  6. 8. hottest layer of atmosphere.
  7. 10. galaxy: old.
  8. 12. apparent shift.
  9. 13. star: collapsed the core of a high mass star.
  10. 16. bang: start expansion.