Ludgershall Castle is a ruined 12th century royal residence in Wiltshire. I positioned myself so the North Star was above and just to the right of the ruined keep and sky was visible through its window. I then made a sequence of 30-second exposures, which I combined in processing to show the result of Earth's rotation over one hour. Because the castle wall was close to my camera, I needed additional depth of field to get it sharply focused so I made an additional exposure at F/8 for 4 minutes for the foreground. The terrestrial landscape is lit by gibbous moonlight.
F/2.8, 110 exposures of 30 seconds, ISO 1600
Accepted: Olympic (Greece) - Zeus, Aphrodite and Apollo