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By P Gosselin on 20. January 2017
Share this…FacebookTwitterThe sun in December 2016, and a look ahead By Frank Bosse and Fritz Vahrenholt (Translated/summarized by P Gosselin) In December solar activity was rather quiet, with the sunspot number at only 19.5. The sun was spotless over 6 days, and already this month there have been 10 spotless days so far. In December […]