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The Round Earth and Christopher Columbus
Type:    Electronic Citation
Title:    The Round Earth and Christopher Columbus
Author(s):    Stern, D. P.
Date:    2004/12/12
Abstract:    The story of Columbus and early attempts to establish the shape and size of the earth; part of an educational web site on astronomy, mechanics, and space
Keywords:    Columbus, flat earth, horizon, Erathosthenes, Posidonius, El Mamun, size of the earth
Journal (full):    nasa.gov
Link:    http://www-istp.gsfc.nasa.gov/stargaze/Scolumb.htm

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