The photo's is mainly untouched, it is pretty much shot as is, straight out of the camera, only thing I did was straighten the horizon a touch
and do a little bit of sharpening, which I do to all images anyway. I still haven't even got around to do any noise reduction or dark frame subtraction on it... yes I always do dark frame subtraction on all my night images, because my poor old 400D had a huge amount of hot and cold pixels now.