Comment on The glass is half empty in the Goldilocks zone.

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hips_and_nips@lemmy.world ⁨9⁩ ⁨months⁩ ago

Not only do they date back hundreads of years, they are all over the planet. First modern planetarium was built in Germany in the early 1920s.

en.wikipedia.org/wiki/List_of_planetariums

en.wikipedia.org/wiki/Planetarium

en.wikipedia.org/wiki/Timeline_of_planetariums

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