The projection of the stars, sun, moon and planets thrilled all visitors who experienced the planetarium for the first time. The new projection planetarium from ZEISS rightly earned the designation "the miracle from Jena". This is how Elis Strömgen, the director of the Copenhagen Observatory, described it in 1925 after a visit to Zeiss in Jena: “Never was a medium of demonstration created as instructive as this, never one that would have been more enchanting, never one that addresses everyone to the same degree as this one. It is school, theater, film all at once, a lecture hall under the firmament of the sky, a stage on which the celestial bodies are the actors.”