PREVIEW SUNSPOTS: Colleague Bob Zimmerman reminds that little is known and much less is understood of the 11 year trough to peak observed cycle of sunspots. More.
The John Batchelor Show - En podcast av John Batchelor - Fredagar
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PREVIEW SUNSPOTS: Colleague Bob Zimmerman reminds that little is known and much less is understood of the 11 year trough to peak observed cycle of sunspots. More. 0CT0BER 1960
