Star Trails at Organ Pipe National Monument
Kodak Pro 400 PPF - 6 x 7 cm Pentax medium format w/55mm lens - 150 min
The setting for this star trails photo is the pristine desert landscape of the Organ Pipe National Monument in Southern Arizona. The Seguaro cactus in the foreground is at least 25 feet tall.
Star trails are made by the combination of: the spinning of the Earth, the use of a stationary mount or tripod and a long exposure of the film. As the Earth spins, the stars begin to make concentric circles on the photograph. The closer stars are to Polaris, our North pole star, the smaller their circles. Thar farther away they are, the larger their circles.