Galaxies

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Across
  1. 3. a place in space where gravity pulls so much that even light can not get out
  2. 5. velocity of recession and distance
  3. 8. mass that has no light
  4. 12. very luminous
  5. 13. very little gas
  6. 14. large spiral galaxy
Down
  1. 1. the disk of the galaxy
  2. 2. spherical cloud of stars and star clusters
  3. 4. no arms
  4. 6. elongated nucleus with sprial arms
  5. 7. a flattened cloud of billions of stars
  6. 9. objects used to map spirals
  7. 10. no obvious nuclear bulge or spiral arms
  8. 11. a system with millions of stars
  9. 12. our galaxy
  10. 14. (Mpc)