GALACTIC DOOM EDUCATIONAL REFERENCES

GTN page on active galaxies: http://gtn.sonoma.edu/resources/active_galaxies/

GTN page on normal galaxies: "http://gtn.sonoma.edu/resources/normal_galaxies/

NASA World Book Entry on galaxies: http://www.nasa.gov/worldbook/galaxy_worldbook.html

Hubble gallery of galaxies: http://hubblesite.org/gallery/album/galaxy/

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