NGC 7331 is a spiral galaxy, probably not too dissimilar from our own (except that it lacks a bar), which is relatively nearby. (At a mere 49 million light-years, it's not in our own back yard, but it's just down the block.)
Image: Paul Mortfield and Dietmar Kupke/Flynn Haase/NOAO/AURA/NSF
Several years ago, the first time I thought Astronomy 253 ("Galactic Astrophysics"), I had an entire problem set entitled the "NGC 7331 problem set." In fact, this was a general problem set about the properties and dynamics of spiral galaxies, but I chose NGC 7331 as the example that was referenced in all of the problems.
Before I say the next thing, I want to say that the students in this class were a great bunch of students. One of them the next year would do research with me, and is now in graduate school at Colorado. I really enjoyed teaching this class, and really enjoyed working with that group of students.
So, disclaimers laid, so you don't read the rest of this the wrong way. I walked into the conference room that the particle physicists on my floor use for meetings and videoconferences; I've occasionally used it for the same purposes. That year, sometimes students would work together there. I walk into this room, and what do I see written on the whiteboard?
"I hate NGC 7331."