November 18, 1897 |
His astronomical period of activity extended from 1896 to 1907.[2] In 1924, less than a year after the first planetarium had been opened at the Deutsches Museum in Munich, Walther Villiger suggested a new, improved Zeiss planetarium projector. This new Zeiss, known as the Mark II, was designed for much larger theatres than the previous model - up to 23 metres https://web.archive.org/web/20051028154633/http://griffithobs.org/IPSFox.html.
Asteroid 1310 Villigera is named after him.