| http://www.w3.org/ns/prov#value | - Cycles with the sort of periodicity you are talking about are rarely ???precisely timed???, because there are many shorter scale cycles which may be in or out of phase with them. if it did coincide with Maunder Minimum, this may help explain the extra depth and longevity of that minimum in comparison to the other minima which coincide with the 180 year Barycentric oscillation induced ???retrograde
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