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Name: Martin
Status: other
Grade: other
Location: NV
Country: N/A
Date: N/A
Question:
Why do astronomers say that the solar cycle is really 22 years long, even though the number of sunspots varies over an 11-year period?

Replies:
The magnetic poles flips every 11, or so, years. To get back to the original polarity is about 22 years.

--Nathan A. Unterman


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