My first email was Firstname_Lastname@aol.com. When aol became insufferable and a challenger appeared, I made Firstname.Lastname@gmail.com.
Gmail lets you add "."s anywhere and it’ll still work, so all my spammy or whatever things I sign up for are Firs.T.Nam.E.L.Astnam.E@gmail.com or some random variation. Makes it easy to delete all the junk.
It’s been a while since I’ve done long exposure photography and composites, but my recollection is that excessive noise is a symptom of long exposure and high ISO, and stacking multiple shorter exposures into a composite will significantly reduce the noise of the final photo.