The 500 mm (19.seven in) mirror telescope was arrange on the outside with the observatory inside the early 1960s to switch the enormous telescope, which was quickly shut down at the time. This telescope is particularly ideal for the observation of so-referred to as deep sky objects - stars, nebulae https://planetariumjena08642.blogpostie.com/39720201/detailed-notes-on-zeiss-planetarium-jena