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Combining 15s interval whole-sky-camera photos to form a 4y spanning keogram
Attached: 1 image For the 4th year in a row, my all-sky camera has been taking an image of the sky above the Netherlands every 15 seconds. Combining these images reveal the length of the night changing throughout the year, the passage of clouds and the motion of the Moon and the Sun through the sky. #astrophotography
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