CHRIS COOK / SCIENCE PHOTO LIBRARY CHRIS COOK / SCIENCE PHOTO LIBRARY
Amateur astronomy, time-exposure image. The long exposure has formed these streaks of light in the night sky, which are due to the apparent motion of the stars caused by the Earth's rotation. It has also made the different colours of the stars more visible. These colours are due to the different ages and chemical composition of the stars. Below the star trails, several amateur astronomers have gathered to take advantage of the clear viewing conditions in this desert region. Red lights help to preserve night vision.
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