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Tropic of Capricorn


By - Posted on 25 July 2010

Tropic of Capricorn

This is a photo marking the Tropic of Capricorn in Argentina. The Tropic of Capricorn drifts about 15 meters per year, so it may not currently be in this spot.

The Tropic of Capricorn, or Southern tropic, is one of the five major circles of latitude that mark maps of the Earth. It currently (Epoch 2010) lies 23° 26′ 16″ south of the Equator.

It is currently drifting north at the rate of almost half a second (0.47) of latitude, which is about 15 metres, per year (it was at exactly 23º 27' S in year 1917).

It marks the most southerly latitude at which the sun can appear directly overhead at noon. This event occurs at the December solstice, when the southern hemisphere is tilted towards the sun to its maximum extent.

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