Copernicus and the Tusi Couple – Or was it Proclus?

Cool illusion!

Tallbloke's Talkshop

Some scholars say that Copernicus was influenced in his astronomical theory by 13th century Persian mathematician Nasir al-din al-Tusi, who discovered (or re-discovered) a principle for converting angular motion to reciprocating linear motion. Watch the neat video below to see the basis of this motion conversion

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