Unit 15 Vocabulary Review

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Across
  1. 4. A cluster of about 2,000 galaxies that is the closest to us...about 60 million light years away
  2. 7. A huge group of single stars, star systems, star clusters, dust, and gas bound together by gravity
  3. 9. A group of galaxies bound by gravity
  4. 10. A galaxy shaped like a round or flattened ball, generally containing only old stars
  5. 11. Cosmological model that explains the sudden development of the universe through expansion from a hot, dense state.
  6. 13. A large collection of galaxy clusters that are often separated from one another by a massive void
Down
  1. 1. Galaxy that contains our Solar System
  2. 2. matter that emits no light at any wavelength
  3. 3. A galaxy that does not have a regular shape
  4. 5. A spiral galaxy with a central bar-shaped structure composed of stars.
  5. 6. a galaxy with a bulge in the middle and arms that spiral outward in a pinwheel pattern
  6. 8. The shift to a different wavelength in relation to the observer. The further away, the redder the wavelength becomes.
  7. 12. A force of attraction between objects that is due to their masses.