Check out our collection: https://scratch.mit.edu/studios/51915572 All made by @Gumushroom See inside for code and notes Al-Tusi was a Persian mathematician who in 1247 figured out that two circles rolling together can produce a perfectly straight line — using that to fix a flaw in how scientists at the time modeled the movement of planets. 300 years later, Copernicus used the exact same idea to build the model that proved the sun is the center of our solar system. He never credited al-Tusi once.
