Distance between Athens, Greece and Thornton, Colorado, USA
9915 km = 6161 miles
We assume a spherical Earth as a close approximation of the true shape of the Earth (an oblate spheroid). The distance is calculated as great-circle or orthodromic distance between city centres on the surface of a sphere.
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Athens, Greece
Country: GreeceAthens’ coordinates: 37°58′46″ N, 23°42′58″ E
Population: 664,046
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Wikipedia article: Athens
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Thornton, USA
Country: USAState: Colorado
Thornton’s coordinates: 39°52′04″ N, 104°58′18″ W
Population: 118,772
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Wikipedia article: Thornton
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