You said about what I would have said about the noise issue, @Dan-Cope! 🙂
I would also add that if I were you, @blake I would open up the aperture a bit; f/16 is way overkill for night skies. Since it’s so dark, you need to let in more light, I would say f/4 would be a better choice for night skies, or even lower, if you have the option!