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Related articles:
Sphere
Flat Earth
Eratosthenes
Celestial sphere
Aristarchus of Samos
Heliocentrism
Anaximander
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Christopher Columbus
Key terms: km earth bce radius frac sphere shape mean geodesy sqrt measured spherical ptolemy circumference mun polar geoid astronomy maps islamic ellipsoid accurate preserve estimate plato aristotle approximate spheroid oblate meridian geographia denoted astronomer equatorial seleucia rotation latitude armenian geography earth radius herodotus per degree mean radius century bce eratosthenes arabic miles spherical earth ellipsoidal model international union of geodesy union of geodesy and geophysics Search external links cited by footnotes on Wikipedia page Spherical Earth: |
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