Adriana S- 1st hour

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Across
  1. 3. -stream of changed particles.
  2. 6. -q trillion miles.
  3. 7. -starts of expansion.
  4. 10. -bright center of a distant galaxy.
  5. 13. -loop of gas.
  6. 14. -tells us galaxies are moving away.
  7. 18. -cloud of gas and dust.
  8. 19. -Irregular shape.
Down
  1. 1. -outer stars are hot and young, inner is
  2. 2. -hottest layer of atmosphere.
  3. 4. -collapsed core of a high mass star.
  4. 5. -Oval shaped, old stars.
  5. 8. -cooler areas on surface.
  6. 9. -fusion of H2 and Helium.
  7. 11. -the raisins spread apart as bread rises.
  8. 12. -collapsed neutron star, no light escapes.
  9. 15. -squeezing atoms together.
  10. 16. -warm rises, cool sinks.
  11. 17. -apparent shift.