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Star trail photography on salt lake in Lut desert in Iran. A star trail is a type of photograph that uses long exposure times to capture diurnal circles, the apparent motion of stars in the night sky due to Earth's rotation. A star-trail photograph shows individual stars as streaks across the image, with longer exposures yielding longer arcs.
Night photography (also called nighttime photography) is the capturing of images outdoors between dusk and dawn. Night photographers generally have a choice between using artificial lighting and using a long exposure , exposing the shot for seconds, minutes, or hours in order to capture enough light to record an image.
Specialized and ever-larger optical telescopes were constructed as essentially big cameras to record images on photographic plates. Astrophotography had an early role in sky surveys and star classification but over time it has used ever more sophisticated image sensors and other equipment and techniques designed for specific fields.
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Light trails. Light trails are another photographic effect where motion blur is used. Photographs of the lines of light visible in long exposure photos of roads at night are one example of the effect. [12] This is caused by the cars moving along the road during the exposure. The same principle is used to create star trail photographs.
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A star-trail photograph shows individual stars as streaks across the image, with longer exposures yielding longer arcs. Star trails over the ESO 3.6 m Telescope [ 2 ] A star trail photograph showing the apparent motion of stars around the north celestial pole ; Polaris is the bright star near the pole, just above the jet trail.
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