posted
Jun 14, 2010 by News Gatherer
For centuries, astronomers have recorded when these black spots on the solar surface, but just so you disappear again after a few days, weeks or months. Thanks for your efforts, we know that the number of sunspots rise and fall in cycles lasting about 11 years. New Scientist: What is wrong with the sun? - Sunspots come and go, but recently have been lost.
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