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