On Nov 11, 2019 KIS scientists together with C. Schmidt from Boston University observed and recorded the Mercury transit in front of the Sun with the GREGOR and Chrotel telescopes. Mercury transits are rare events and the next one will occur only in 2032. Such transits are great opportunities to study Mercury's exosphere. The first two-dimensional image of this exosphere was obtained by H. Schleicher at KIS at the occasion of the second to last transit in 2003, using the VTT telescope and the spectral line of sodium.

The Mouse was back! Finally, on October 3, 2019, Schauinsland Observatory opened its doors to the very young. This was the seventh time that the German television children’s series “The Show with the Mouse” invited children from age 6 and their families to visit the observatory.