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• 18:26, December 1, 2005 Iantresman (+443) . . (Kristian Birkeland's magnetised terrella simulating a spiral nebula. Sourced from the book, The Norwegian Aurora Polaris Expedition 1902-1903, Volume 1: On the Cause of Magnetic Storms and The Origin of Terrestrial Magnetism, Section 2. C)

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