Monday June 14, 2010
What's wrong with the sun?
Stuart Clark
New Scientist
Sunspots come and go, but recently they have mostly gone. For centuries, astronomers have recorded when these dark blemishes on the solar surface emerge, only for them to fade away again after a few days, weeks or months.
Thanks to their efforts, we know that sunspot numbers ebb and flow in cycles lasting about 11 years.
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