| Sunspot
activity follows an 11-year cycle |
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| Traditionally
the |
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| number of
sunspots |
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| defines the
rise and |
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| fall of solar
activity. |
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| This chart
shows |
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| that the Sun
may |
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| approach its
peak |
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| level or
“solar |
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| maximum”
around |
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| mid-2000. |
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| Dotted yellow lines
represent range of predictions; light blue actual numbers to date. |