Tuning Fork Diagram http://skyserver.sdss.org/dr1/en/proj/advanced/galaxies/tuningfork.asp
Video 1 - Black Hole Death Ray http://www.youtube.com/watch?v=9AP1_ZqB6g4
Video 2 - Galactic Cannibalism http://www.youtube.com/watch?v=y1hMjFg10aI