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By P Gosselin on 18. October 2016
The Sun in September 2016 By Frank Bosse and Prof. Fritz Vahrenholt (Translated and edited by P Gosselin) Also last month the sun was relatively inactive. The observed sunspot number (SSN) was 44.7, which was just 64% of what is the average for the previously observed 23 cycles. The average cycle has a duration of 11 […]