Every spring we participate in the National Stargazing Days and every year in October the Nacht van de Nacht. From October to March, stargazing evenings are regularly organized, depending on the weather. During these public evenings, guided tours are given at the observatory itself. Besides that, anyone can watch stars with clear weather with the Gratama Telescope and some telescopes on the roof of the observatory. Furthermore, there are astronomical activities for young and old such as crafts, quizzes and lectures, and also regularly available, the Kapteyn Mobile Planetarium. The public evenings are always accessible free of charge.