I was either camping under the trees or fell asleep soon after dark and missed looking at the starry wilderness available to AT hikers.
Or the moon was out...which is no good for naked eye viewing of the fainter stars and milky way.
Two times that really stand out in my memory are
Once in 1993 I bivvy'd on top of Bald Pate in Maine and it was absolutely the best AT stargazing I have ever done
- except for the night on Max Patch Mtn. in April 1985, with the Lyrid meteors flying overhead.
The northern lights should be more numerous over the next few years. Looking forward to that.