How did Eratosthenes measure the circumference of the earth?

Jun 30th, 2015
Studypool Tutor
Price: $10 USD

Tutor description

Eratosthenes is credited by Cleomedes in On the Circular Motions of the Celestial Bodies with having calculated the Earth's circumference around 240 B.C.E., using trigonometry and knowledge of the angle of elevation of the Sun at noon in Alexandria and Syene (now Aswan, Egypt).

Word Count: 468
Showing Page: 1/4
Eratosthenes ExperimentReferences:O'Connor, J.Jand Robertson E.F. (1999, January). Eratosthenes of Cyrene. Retrieved from http://www-history.mcs.stand.ac.uk/Biographies/Eratosthenes.htmlRubin, J.T. (2011, January). Eratosthenes: the measurement of the earth's circumference. Retrieved from http://www.juliantrubin.com/bigten/eratosthenes.htmlEratosthenes. (2007, February). Retrieved from http://www.newworldencyclopedia.org/entry/EratosthenesHow did Eratosthenes measure the circumference of the earth? How accurate was he compared to modern day measurement?Measurement of the EarthEratosthenes is credited by Cleomedes inOn the Circular Motions of the Celestial Bodieswith having calculated the Earth's circumference around 240B.C.E., using trigonometryand knowledge of the angle of elevation of theSunat noon in Alexandria and Syene (now Aswan, Egypt).Eratosthenes heard of a deep well at Syene (near the Tropic of Cancer and modern Aswan) where sunlight only struck the bottom of the well on the summer solstice, and determined that he could discover the circumference of the earth. (Greek scholars knew that the earth was a a sphere).He knew that on the summersolsticeat loc

Review from student

Studypool Student
" Thanks for the help. "
Ask your homework questions. Receive quality answers!

Type your question here (or upload an image)

1828 tutors are online

Brown University





1271 Tutors

California Institute of Technology




2131 Tutors

Carnegie Mellon University




982 Tutors

Columbia University





1256 Tutors

Dartmouth University





2113 Tutors

Emory University





2279 Tutors

Harvard University





599 Tutors

Massachusetts Institute of Technology



2319 Tutors

New York University





1645 Tutors

Notre Dam University





1911 Tutors

Oklahoma University





2122 Tutors

Pennsylvania State University





932 Tutors

Princeton University





1211 Tutors

Stanford University





983 Tutors

University of California





1282 Tutors

Oxford University





123 Tutors

Yale University





2325 Tutors