One of the geometric constructions that w:Aristarchus of Samos used to determine the distance to the w:Sun and w:Moon. Redrawn from an image in Heath, Aristarchus, a public-domain work (published in 1913).
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One of the geometric constructions that Aristarchus used to determine the distance to the Sun and Moon. Redrawn from an image in Heath, ''Aristarchus'', a public-domain work (published in 1913).
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