The NED is a good resource for info on DSO's, but sometimes it can be hard to sort out what exactly you're looking at, since it presents information in a slightly confusing way. (NED is Nasa's Extragalactic Database, btw)
i thought the astro test at states (ny) was ridiculously broad last year. there were entire sections of the test that bore no relation whatsoever to the specs sheet.
"Duct tape is like the force. It has a light side, a dark side, and it holds the universe together."
2012: Astro, Dynamic Planet, Optics, Remote Sensing
2011: Astro, Dynamic Planet, R.I.P. Picture This
2010: Astro, Picture This, Dynamic Planet, Write It Do It