hips_and_nips , 3 months ago (edited 3 months ago) Not only do they date back hundreds of years, they are located all over the planet. First modern planetarium was built in Germany in the early 1920s. https://en.wikipedia.org/wiki/List_of_planetariums https://en.wikipedia.org/wiki/Planetarium https://en.wikipedia.org/wiki/Timeline_of_planetariums
Not only do they date back hundreds of years, they are located all over the planet. First modern planetarium was built in Germany in the early 1920s.
https://en.wikipedia.org/wiki/List_of_planetariums
https://en.wikipedia.org/wiki/Planetarium
https://en.wikipedia.org/wiki/Timeline_of_planetariums