Stock Photo: Star Trail With Tree At The Center
ID 251153489 © Sheetalsaini | Megapixl.com
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. The term is used for similar photos captured elsewhere, such as on board the International Space Station and on Mars. Typical shutter speeds for a star trail range from 15 minutes to several hours, requiring a `Bulb` setting on the camera to open the shutter for a period longer than usual. However, a more practiced technique is to blend a number of frames together to create the final star trail image. Star trails have been used by professional astronomers to measure the quality of observing locations for major telescopes.
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arcs astronomers atar bulb camera capture captured circles create diurnal earth exposure exposures frames hours image international locations long major measure minutes motion night observing open period photos professional quality requiring rotation setting several shutter sky space speeds star stars station streaks technique telescopes together trail yielding
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