Star trails

IMAGE NUMBER: P7008 LICENSE: RIGHTS MANAGED

Star trails. Time-exposure view of star trails above cirrus clouds. Star trails are formed due to the apparent motion of the stars at night caused by the Earth's rotation. All northern stars appear to circle the north celestial pole, and the southern stars circle the southern one. At the celestial equator, as seen here, the trails have a biconcave shape. At lower left, the stars occupy the southern hemisphere, and appear to be circling a point further down to the left. At upper right, the stars are in the northern hemisphere, and appear to be circling a point beyond the top right corner.

Credit: Jerry Schad / Science Source

Model Release: No, but may not be necessary

File Size: up to 14.8" by 9.8" (at 300dpi)

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star trails, equatorial, celestial equator, star trail, cloud, cirrus clouds, cirrus cloud, horizontal, green, night sky, night skies, clouds, astronomy, astrophysics, science, time-exposure, time exposure, northern star, northern stars, star, stars

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