3084 20170116144112.0 OUTRTLK-2017-0012 Vanlommel, Petra Zon, zonnevlekken, proba2, zonnewind: quiz 2016 2016-03-24 STCE D'Huys, Elke Janssens, Jan PROBA2@school, klein-Seminarie, Hoogstraten, Belgium petra.vanlommel@observatoire.be OUTRTLK