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Key terms: eratosthenes bc greek sun earth distance stadia km map moon size measurement syene alexandria eusebius egypt iii sieve method paper error text knew nile accuracy circumference angle estimate cyrene ancient greek librarian stadium arsinoe numbers lighthouse algorithm elevation hellenistic further reading size of the earth distance to the sun library of alexandria earth with eratosthenes Search external links cited by footnotes on Wikipedia page Eratosthenes: |
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