Across
- 5. make up two-thirds of spiral galaxies
- 7. centers of galaxies emitting less energy than quasars
- 8. streams of material being emitted from quasars
- 13. a quasi-stellar object
- 15. the change in the spectrum that indicates objects are moving away from us
- 17. when ____ the accretion disk gives of lots of energy
- 19. the types of stars Hubble used to measure the distances to galaxies
- 20. the relationship between the distance to a galaxy and its speed
- 21. the band of material around a blackhole
- 24. what a quasar really is
- 26. galaxies with a central bulge and a disk made of spiral arms
- 27. the distance light can travel in a year
- 28. another name for the football shape of some galaxies
Down
- 1. quasars are found in the ____ of galaxies
- 2. the change in the spectrum that indicates objects are moving towards us
- 3. he discovered galaxies are made of individual stars
- 4. early discovered quasars were a strong source of this
- 6. a collection of gas, dust, and stars held together by gravity
- 9. the type of supernova useful for measuring distances to galaxies
- 10. a _____ blackhole triggers the forming of a galaxy
- 11. galaxies with an unorganized shape
- 12. Elliptical galaxies contain mostly ____ stars
- 14. the diagram Hubble used to classify galaxies
- 16. the quasars are moving ___ to be in our galaxy
- 18. a cloud of gas and dust
- 22. galaxies with a spherical or ellipsoid shape
- 23. what a quasar is doing
- 25. most quasars formed ____ in the universe