Star Trails Photo Galleries
Planet Earth makes one complete rotation on its axis in 24 hours. This motion causes the Sun and Moon to rise and set. Perhaps not as obvious, it also causes the stars and constellations to rise and set in the course of a day.
Any camera with a B or bulb setting will allow you to hold the shutter open for tens of minutes or even hours. Try this at night and you'll be able to capture the diurnal motion of the stars as graceful streaks across the sky. Of course, the camera needs to be mounted on a sturdy tripod to keep it stationary during such long exposures. Likewise a mechanical cable release or electric shutter cord is needed to hold the shutter open.
The following photo galleries displays some of the star trail photographs I've take all over the world.