The Enduring Enigma of the Solar Cycle: Mark Miesch from kinetic energy of rotation Watch Video
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⏲ Duration: 13 min 42 sec ✓ Published: 31-May-2021
Description: Sunspots come and go every 11 years. To put it more precisely, the area of the solar surface covered by sunspots rises and falls with a quasi-regular 11-year cycle that is part of a more fundamental, and more extensive, 22-year magnetic activity cycle. We have known about this cycle for over 150 years and evidence from cosmogenic isotopes indicates that it has been occurring for thousands of years before that, at least. Some cycles are stronger than others, but it is not the variability of the c
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