  The solar luminosity in the visible changes at the 10-3 level, following an
11 years period. In X-rays, which should not be there, the amplitude varies
100000 times stronger, making their mysterious origin since the discovery in
1938 even more puzzling, and inspiring. We suggest that the multifaceted
mysterious solar cycle is due to some kind of dark matter streams hitting the
Sun. Planetary gravitational lensing enhances (occasionally) slow moving flows
of dark constituents towards the Sun, giving rise to the periodic behaviour.
Jupiter provides the driving oscillatory force, though its 11.8 years orbital
period appears slightly decreased, just as 11 years, if the lensing impact of
other planets is included. Then, the 11 years solar clock may help to decipher
(overlooked) signatures from the dark sector in laboratory experiments or
observations in space.
