If you have more than 3 or 4 night-sky shots in a row, film developers sometimes have trouble finding the border between frames. Having them chop the film in the middle of a frame is a bummer. That's why I intentionally overexpose every 4th frame (by, say, shining a red flashlight into the lens). They'll probably be fine, but I had ONE bad experience years ago. Another option is to tell them not to cut the negatives, but that leaves an awkward roll to handle.
If you go to a one-hour photo shop, they'll develop the negatives well, but their machine may refuse to print some of them if the computer detects a badly "underexposed" frame--i.e. a properly exposed night sky shot. Not to worry. A professional photo shop can print the negatives that came out best, if you use a magnifying glass to inspect them and tell them which ones to print. Or just go to a professional shop and tell them to print ALL exposures, explaining that they're the night sky.