Australian photographer Lincoln Harrison spends hours with his camera set on a tripod in the Australian Outback trained on the night sky. He then joins hundreds of images of the foreground and the stars together to create magnificent star trail pictures of beauty spots near Lake Eppalock in the southern state of Victoria. The colourful spirals are the result of the Earth moving, creating the impression that the stars are travelling across the night sky.
More here Star trails over the Australian Outback - Thanks to Chris Ford for the link.
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Excellent pic, Jim, but they aren’t spirals; they are concentric circles.
Well spotted Alfy. You can sit at the front of the class until you submit another ‘Prof. Bollockioff’ comment and then you’re straight to the back again!