Vocab words

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Across
  1. 4. A unit of distance equal to 1000 pc
  2. 5. The theory that large galaxies absorb smaller galaxies.
  3. 8. A bright blue galaxy in which many new stars are forming
  4. 10. The spherical region of a spiral galaxy containing a thin scattering of stars
  5. 13. Nonluminous material that is detected only by its gravitational influence
  6. 14. Star poor in atoms heavier than helium
Down
  1. 1. An irregularly shaped cluster that contains fewer than 1000 galaxies
  2. 2. Star rich in atoms heavier than helium
  3. 3. A long strand of gas, dust, and stars drawn out of a galaxy
  4. 6. A cluster containing more than 1000 galaxies
  5. 7. Object used to map the spiral arms
  6. 9. The cluster of about 40 nearby galaxies
  7. 11. Long, spiral pattern of bright stars, star clusters, gas
  8. 12. In astronomical usage, any atom heavier than helium.
  9. 13. component All material confined to the plane of the galaxy.