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* with a total solar-constant variability of up to 0.1 % for the Hale cycle.
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Quoth Wikipedia:
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The solar "constant" is not a physical constant in the modern CODATA scientific sense; that is, it is not like the Planck constant or the speed of light which are absolutely constant in physics. The solar constant is an average of a varying value. In the past 400 years it has varied less than 0.2 percent.[2] Billions of years ago, it was significantly lower.
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The 22-year cycle is 'constant', while the 12,000-year cycle is cataclysmic? That's as hard to explain as the Sun not being oblated by it's rotation.