A star trail is a type of photograph that utilizes long-exposure times to capture the apparent motion of stars in the night sky due to the rotation of the Earth. A star trail photograph shows individual stars as streaks across the image, with longer exposures resulting in longer streaks.
Typical exposure times for a star trail range from 15 minutes to several hours, requiring a ‘bulb’ setting on the camera to open the shutter for a longer period than is normal. (wikipedia)
Location : Lhok Seudu, Aceh Besar – Indonesia. Camera : Nikon D3100 Lens Tokina 11-16 mm, f/3.5, 990 sec, ISO 800.