Chapter 15 and 16 Key Terms

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Across
  1. 3. Component Disk of the Galaxy
  2. 4. Tracers Objects used to map spiral arms
  3. 6. Down Hypothesis massive elliptical galaxies formed in a single, rapid collapse of gas and dark matter was turned quickly into stars.
  4. 7. corona Extra Mass in an Extended Halo
  5. 8. Motion Mass concentrated near its center
  6. 10. Fountains Produced by expanding supernova remnants
  7. 11. 2 Stars Stars that are poor in metals
  8. 12. Bulge A flattened cloud of billions of stars
  9. 13. Component Halo and central Bulge together
Down
  1. 1. 1000 Parsecs or 3300 Ly
  2. 2. Galaxies Galaxy that have a fluffy appearance
  3. 5. Matter Mass that is invisible
  4. 7. Design Galaxies Bold symmetric 2 armed patterns
  5. 9. 1 Stars Stars that are rich with metals
  6. 10. Halo A spherical cloud of stars and star clusters