Eidouranion
An eidouranion is a kind of orrery that combined mechanical movement with a method of back projection. Its invention is attributed to Adam Walker (1731–1821) who in the 1780s built one measuring 27 ft (8.2 m) in diameter.
An eidouranion is a kind of orrery that combined mechanical movement with a method of back projection. Its invention is attributed to Adam Walker (1731–1821) who in the 1780s built one measuring 27 ft (8.2 m) in diameter.
An eidouranion is a kind of orrery that combined mechanical movement with a method of back projection. Its invention is attributed to Adam Walker (1731–1821) who in the 1780s built one measuring 27 ft (8.2 m) in diameter.
Source: Wikipedia "Eidouranion" · CC BY-SA 4.0
Share this article: X · Bluesky