August Aurora by Tim Kirby
Near Mayerthorpe, Alberta, astrophotographer Tim Kirby captured this colourful auroral display on August 31. The Pleiades star cluster is near the horizon, on the right side of the frame. He used a Canon EOS 5D Mark II DSLR camera with a 28mm lens at f/4 for a 25-second exposure at ISO 2500.
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