Photographer Lincoln Harrison(Australia) created some amazing shots in the dead of winter. These shots were taken over a period of 15 hours from sunrise to sunset. The article does not explain the technique used, but you can tell it was done with a set timer on his camera to take a long exposure shot approximately every 30 minutes. Otherwise he was clicking the release every half hour and to pass the time he would sit outside with a warm blanket, some hot cocoa and an iPad to make sure he does not miss out on the next update from JWolfMedia.com. After he finished the extremely long shoot, he would stack the images using a stacking software or script to create a new beautiful and dramatic image. You can download this stacking software to combine these images from the link provided. Happy star trails to you!