I have always been a big fan of night time photography. From illuminated skylines to the electrified city streets that take on a life of their own with cars leaving light trails all over the place. I have always enjoyed recreating such images because of how different they are from the norm. Night time photography is a lot of trial and error, and i think i speak for a lot of people when i say this. When you take a longer exposure shot it might take two or three exposures to arrive at what you want, which in turn takes up a lot of time, making it somewhat difficult for a newcomer to night photography to get the results they are looking for. In my opinion, the mecca of all night time photography (and more difficult to get right) is capturing star trails swirling across the sky while keeping the foreground interesting and eliminating noise(the digital grain that gets all over the picture) during these long exposure shots.
Down below is a video i happened across on Youtube which features a presentation of star trails captured by a talented photographer taking it to the next level. Enjoy