Galaxies

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Across
  1. 4. unseen material that makes up most of the universe
  2. 8. spiral galaxy with tight arms
  3. 12. small spherical dense galaxies
  4. 14. very spherical elliptical galaxy
  5. 15. pinwheel galaxies with arms
  6. 17. 50000-1 million stars in a group in a galaxy
  7. 18. candle method to calculate distance to stars and galaxies
Down
  1. 1. the galaxy we live in
  2. 2. the flattened portion of a spiral galaxy
  3. 3. when 1 galaxy engulfs another
  4. 5. very elliptical galaxy
  5. 6. very dense star left after a supernova
  6. 7. group of less than 1000 galaxies
  7. 9. type of galaxy they think milky way is
  8. 10. group of 1000 of more galaxies
  9. 11. the round center portion of a spiral galaxy
  10. 13. 3.26 light years
  11. 16. the outer stars of a galaxy not in the disk