WOW. Just discovered this thread, and I've been staring in awe at all of these amazing images for the last couple of hours!
I haven't done much night photography, but I am definitely inspired!!! It seems really difficult to get the quality of shots you all are producing, but hopefully LOTS of playing around with it will get it halfway there.
Question... I only have lightroom - and just upgraded to lightroom 6... can the type of stacking some of you are talking about be done in LR6? Like with the 100+ 30sec. shots?