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Cosmic Distances

Phronesis 45 (3):175-204 (2000)

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  1. The Two Earths of Eratosthenes.Christián Carlos Carman & James Evans - 2015 - Isis 106 (1):1-16.
    In the third century b.c.e., Eratosthenes of Cyrene made a famous measurement of the circumference of the Earth. This was not the first such measurement, but it is the earliest for which significant details are preserved. Cleomedes gives a short account of Eratosthenes’ method, his numerical assumptions, and the final result of 250,000 stades. However, many ancient sources attribute to Eratosthenes a result of 252,000 stades. Historians have attempted to explain the second result by supposing that Eratosthenes later made better (...)
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