Eratosthenes of Cyrene (c. 276-c. 196 BC)

Details Eratosthenes of Cyrene (c. 276-c. 196 BC) Eratosthenes of Cyrene (c. 276-c. 196 BC)

Nov 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000eaa..booke3607.&link_type=abstract

"Encyclopedia of Astronomy and Astrophysics, Edited by Paul Murdin, article 3607. Bristol: Institute of Physics Publishing, 2001

Astronomy and Astrophysics

Astronomy

History And Archaeoastronomy, Biographies

Scientific paper

Astronomer, philosopher, geographer and geometrist (developed theorems in prime number theory), born in Cyrene (now Shahhat, Libya) became librarian in Alexandria. Eratosthenes made a surprisingly accurate measurement of the size of the Earth. Having heard that at the summer solstice the Sun illuminated the bottom of a well at Syene (now Aswan, south of Alexandria), and was therefore overhead, he...

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