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Sunspot Cycles & Their Impact On Human History by MW Mandeville
Submitted: Thu Oct 14 2004
CT: Earth Changes: Sunspot Cycles & Their Impact On Human History by MW Mandeville
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What Are Sun Spots: Sunspots are seen as "small" dark spots on the surface of the sun. They are easy to observe and count if the sunlight is strongly filtered. They were first noticed (in Western record) in the year 325 BC by Theophrastus, an Hellenic scientist, and they have been counted on a regular basis since the middle of the 17th century. They come and go in cycles which average about 11 years, as shown in Chart 101 above.