2 ms·
One calculation (75 BC) used the angle of Canopus, which was conveniently near the horizon. https://en.wikipedia.org/wiki/Posidonius#Calculation_of_Earth's_circ
by ahazred8ta 3y ago
One calculation (75 BC) used the angle of Canopus, which was conveniently near the horizon. https://en.wikipedia.org/wiki/Posidonius#Calculation_of_Earth's_circumference https://en.wikipedia.org/wiki/Posidonius#Calculation_of_Eart...