David Dorn - RT @HistAstro: Brass astrolabe by Hans Dorn, Austria, c. 1500; with 4 tympans and 35 star markers; the rete is made of 60 small pieces of b…

1:47pm PST - December 27th, 2021

RT @HistAstro: Brass astrolabe by Hans Dorn, Austria, c. 1500; with 4 tympans and 35 star markers; the rete is made of 60 small pieces of b…

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