The winter solstice is the day with the shortest period of daylight and longest night of the year, when the Sun is at its lowest daily maximum elevation in the sky

see also : Cultural axis

At noon the sun is directly above the the tropic of Capricorn (0°). We use those obesvations to calculate the circumference of the Earth.

Very good measures as the circumference of the Earth is 40080km

Garmisch-Partenkirchen

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Lafrançaise

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Ilion