Bailey vocab crossword

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Across
  1. 3. – flat, rotating part of a galaxy with stars and gas
  2. 4. – dense, round center of a galaxy
  3. 8. I stars – young, metal-rich stars (in disc)
  4. 10. II stars – old, metal-poor stars (in halo)
  5. 11. nebula – cloud of dust that blocks light
  6. 12. Way – the galaxy that contains our solar system
  7. 14. nebula – cloud that reflects nearby starlight
Down
  1. 1. nebula – glowing gas cloud that gives off light
  2. 2. cluster – tight group of old stars
  3. 3. wave model – idea that spiral arms are caused by waves of matter
  4. 5. III stars – first stars, almost no metals
  5. 6. cluster – loose group of young stars
  6. 7. – outer, spherical region around a galaxy with old stars
  7. 9. of avoidance – area blocked by dust where we can’t see well
  8. 13. giant maser method – way to measure distances using signals from red giant stars