If you try it out, let us know how it goes! I had been wondering how a night sky might come out. I've been shooting for about six months and haven't tried that yet, but having had very limited success with interior shots, I wouldn't be hoping for much. For example, I tried a 3 hour exposure in a big, dark school hall with a christmas tree lit up in the background. Those pinprick tree lights were similar to stars; they were visible, but, of course, they were stationary (and probably brighter than stars would be). Still worth you experimenting though!