MSO stands for: Mallorca South Observatory.
This small private observatory is located in the south of Mallorca. At first it was located in southern Germany close to the Alps. However, it was decided to move the observatory to Spain because of the ever decreasing number of clear nights.
It is dedicated to planetary and lunar immaging.
An extra platform is being constructed for a planned second dome, holding a remotely operated telecope for deepsky imaging.
Feel free to take a look inside!