Image: Tusi couple
Tusi_couple.jpg (434 × 367 pixels, file size: 45 KB, MIME type: image/jpeg)
Description: Tusi couple - 13th century CE sketch by Nasir al-Din Tusi. Generates a linear motion as a sum of two circular motions. Invented for Tusi's planetary model.
Usage Terms: Public domain
Image usage
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