Startrails with North Star - LeRoy, NY

Tonight I tried something I've been meaning to do for a while. It was a nice clear night (no moon, or clouds), so I gave it a shot. This is 4 pictures with about a 15 minute exposure each stacked to make one shot. The problem with doing this in the cold is that my batteries were only good for about one shot each. If you look at the star trails you'll notice gaps in them, this is the time that it took me to run back to the house to get a new battery and reload it.