Other Galaxies in the Universe

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Across
  1. 5. Galaxies that don't have a defined shape
  2. 6. This is the group that the Milky Way belongs to
  3. 8. This type of galaxy emits lots of radio waves
  4. 11. The sum of the mass is galaxies is always ____ than the luminosity
  5. 13. Given the classification symbol E
  6. 14. The center of active galaxies
  7. 15. Galaxies close together can do this and it changes their shape
Down
  1. 1. This theory explains why the universe is getting bigger
  2. 2. Really big group of galaxies
  3. 3. The mass and luminosity of galaxies can ___ greatly
  4. 4. At the center of AGNs and quasars
  5. 7. The invisible glue holding galaxies together
  6. 9. Given the classification symbol S
  7. 10. These types of galaxies emit lots of energy from the center
  8. 12. Stellar-like objects at the center of active galaxies
  9. 13. Hubble proved the universe is always doing this