The Earth's circumference was first calculated in 240 BC by Eratosthenes using the angle of the Sun during the solstice in 2 cities 500 miles apart (the measurement took 1 year: he walked from Aswan to Alexandria to take the measurement there at the following solstice).
He theorized that the Earth was a sphere, and his calculation was within 5% of modern measurements.
I used to be a big believer in this, but I can't find or measure the 8 in/mi^2 curvature anywhere
Please Login to reply.
No replies yet.
