The Big Dipper over Pyramid Mountain and Pyramid Lake in Jasper National Park, Alberta, October 19, 2016, on a dark moonless night before moonrise. Some foreground illumination comes from lights across the lake on the Pyramid Lake Lodge. The sky has some green from airglow or diffuse aurora. Haze and thin clouds add the natural glows around the stars. No filter was used here.<br /> <br /> This is from a latitude of 54&deg; N so the Big Dipper does not set and is circumpolar despite it being at its lowest point in the sky for the year in the northern autumn season. <br /> <br /> This is a stack of 8 x 20-second exposures for the ground, mean combined to reduce noise, and one 20-second exposure for the sky, all at ISO 6400 with the Sigma 20mm lens at f/2 and Nikon D750. This was from 350 frames shot for a time-lapse sequence.
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