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by soft_dough 1135 days ago
The word I love is "star ball". My local museum has one of these. They're apparently difficult for upkeep, since they've been produced such low volume. There's only a handful of specialists who travel around the country servicing them.
1 comments

There's actually a Wikipedia page [0] (no doubt lovingly curated by beautiful nerds) that has a long list of planetariums with Zeiss star projectors.

But there's still the problem of finding shows where they are actually used...

0: https://en.wikipedia.org/wiki/Zeiss_projector#List_of_planet...