After a “hard night” of letting your photography equipment do all the work for you, hopefully the front of your camera lens didn’t fog up too much at the end of the series of exposures. Bring all your equipment inside, let it acclimate to room temperature, then download the night’s shots into a folder. I usually open about 25 pictures at a time when I start to stitch them together. For these examples I’m using a Mac and a Beta Version of Photoshop CS3. I’ve also purposely lightened all the pictures so that they could be more easily seen.