mondknoten und nutation

Europe will be treated to a partial solar eclipse on Friday, 20 March, which is also the Spring Equinox—with some lucky souls on Svalbard and the Faroe Islands losing daylight to the Moon’s shadow completely.
Weather permitting, for one in the western part of Germany, the event will start at 09:24 (earlier for those more westerly and later for those more easterly), reaching totality at (some 80% in Germany and France) at 10:32 before going on the wane for the next hour. Researchers in Germany are interested, among other things, in observing the dip in photovoltaic power production. The southern hemisphere will be treated to a similar spectacle in September of this year.