The day in question was 30 December 2010, which Kotsiopoulos started by setting up his camera to face east, taking a series of photos following the sun as it moved from east to west. Then, after the sun had set, he pointed the camera west, photographing a series of shots going from west to east, including an 11 hour star-trail sequence (check out this stunning the time-lapse video), to capture the day and night parts respectively.