Galaxy Stuff

APODs: http://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search?galaxy

Wikipedia: http://en.wikipedia.org/wiki/Galaxy

Galaxy Types:
http://en.wikipedia.org/wiki/Elliptical_galaxy
http://en.wikipedia.org/wiki/Spiral_galaxy
http://en.wikipedia.org/wiki/Irregular_galaxy
http://en.wikipedia.org/wiki/Starburst_galaxy
http://en.wikipedia.org/wiki/Ring_galaxy

Collisions:
http://www.npaci.edu/enVision/v15.2/ricker.html

Growing Black Holes Regulate Galaxy Formation:
http://www.cmu.edu/PR/releases05/050209_blackhole.html