Across
- 4. a galaxy with a chaotic mix of gas,dust, and stars.
- 8. nonluminous material that is detected by its gravitational influence.
- 9. when gas heated by supernova explosions throws gas out the disk of a galaxy.
- 10. theory that large galaxies absorb smaller galaxies.
- 11. a cloud of gas collapsing to become a galaxy.
- 12. a galaxy that resembles a ring around a bright nucleus.
- 14. a galaxy with an elongated nucleus with spiral arms on the ends.
- 15. a spiral Galaxy with unusually bright stars.
Down
- 1. a galaxy that contains a disk and spiral arms.
- 2. a bright blue galaxy in which many new stars are forming.
- 3. a round galaxy.
- 5. spherical region of a spiral galaxy
- 6. a small,powerful source of energy from an active core of a galaxy.
- 7. a galaxy that has an obvious disk and nuclear bulge
- 13. long strand of gas,dust, and stars.