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The solar luminosity in the visible changes at the 10-3 level, following an11 years period. In X-rays, which should not be there, the amplitude varies1 times stronger, making their mysterious origin since the discovery in1938 even more puzzling, and inspiring. We suggest that the multifacetedmysterious solar cycle is due to some kind of dark matter streams hitting theSun. Planetary gravitational lensing enhances (occasionally) slow moving flowsof dark constituents towards the Sun, giving rise to the periodic behaviour.Jupiter provides the driving oscillatory force, though its 11.8 years orbitalperiod appears slightly decreased, just as 11 years, if the lensing impact ofother planets is included. Then, the 11 years solar clock may help to decipher(overlooked) signatures from the dark sector in laboratory experiments orobservations in space.

The 11-years solar cycle as the manifestation of the dark Universe