Spherical Earth
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The concept of a spherical Earth dates back to ancient Greek philosophy from around the 6th century BC, but remained a matter of philosophical speculation until the 3rd century BC when Hellenistic astronomy established the spherical shape of the earth as a physical given.
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See also
- Celestial sphere
- Earth radius
- Figure of the Earth
- Flat Earth
- Geographical distance
- Myth of the Flat Earth
- Physical geodesy
- Terra Australis
- WGS 84
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