The five hundred mm (19.7 in) mirror telescope was put in place on the surface from the observatory in the early nineteen sixties to replace the large telescope, which was briefly shut down at time. This telescope is especially suitable for the observation of so-identified as deep sky objects - https://planetariumjena86420.wikinarration.com/5319411/the_definitive_guide_to_sehenswürdigkeiten_jena