You do not need much equipment to take shots at the night-time. You do however need a steady tripod and a wide-angle lens. Most cameras today have a self-timer so use this to avoid any shaking. To get everything as sharp as possible you need to set your aperture at about f/8.0 and to avoid any noise you should set your ISO at 100. As long as you have the tripod you are safe for as long as the exposure will take. Up till 30-40 sec. is not unusual.
You can watch more of my Night-images here: http://kristofferihlen.com/night-images/