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Video Details

Duration: 14 minutes
Country: United States
Language: English
Producer: Jos Leys - Étienne Ghys - Aurélien Alvarez
Director: Jos Leys - Étienne Ghys - Aurélien Alvarez
Views: 113
Posted by: smartvideosws on Oct 5, 2009

Hipparchus explains how two numbers can describe the position of a point on a sphere.
He then explains stereographic projection: how can one draw a picture of the Earth on a piece of paper?

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