DAVID NUNUK / SCIENCE PHOTO LIBRARY DAVID NUNUK / SCIENCE PHOTO LIBRARY
Star trails. Time-exposure image of star trails over a city at dawn. City lights (lower left) reveal a fog near ground level. Star trails are captured by long-exposure photography. The lines of light in the sky are made by the relative movement of the stars and planets through the night sky as the Earth rotates. The colours of the star trails reveal the variety of colours and distances from the Earth of the planets and stars. Photographed over Queen Charlotte city on Queen Charlotte Island, British Columbia, Canada.
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