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Date: 2014-11-06 22:27:36Vortices Wolf number Solar cycle Light sources Plasma physics Space plasmas Space Rudolf Wolf Sun Astronomy Physics Sunspot | Revisiting the Sunspot Number “Our knowledge of the long-term evolution of solar activity and of its primary modulation, the 11-year cycle, largely depends on a single directAdd to Reading ListSource URL: www.leif.orgDownload Document from Source WebsiteFile Size: 1,11 MBShare Document on Facebook |