I took this photograph out at my Parents house. This old barn made an interesting subject. I took 4 15 minute exposures. During the first exposure I used a flashlight to paint some light on the barn and the tree allowing it to show up brighter in the frame. I then combined all 4 photographs in Photoshop to make the star trails longer. Did you know that the stars look like they are moving at night? It looks that way because the earth is rotating. A long expose at night produces interesting Star Trails.