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Aurora

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Aurora: The Aurora is a beautiful natural phenomenon, that occurs most often in the Polar regions of Earth, in the form of majestic, colorful, and irregular lights in the night sky. The Aurora has a variety of shapes, colors, and structures, and also changes in time. As a result no two Aurorae are the same. Auroral activity correlates with the activity of the Sun. The more active is the Sun, the greater the number of Aurorae. Whereas the less active is the Sun the smaller the number of Aurorae. The activity of the Sun changes periodically. It takes 11-years, for the sun to change from its period of low activity (Solar Minima) to its period of high activity (Solar Maxima), and then back to its Solar Minima. This so called 11-year solar cycle results in a greater or less number of Auroral occurrences.


Aurora Borealis on January 21st 2005, between 19.45 and 20.05 UTC, Soest, The Netherlands.
Aurora Borealis on October 30th 2003, between 21.00 and 21.30 UTC, just north of Soest, The Netherlands.
Aurora Borealis on October 29th 2003, between 18.30 and 18.45 UTC, just north of Soest, The Netherlands.



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