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Ptolemy's Observatory, 2nd Century Ad
Photograph - Photograph
Ptolemy's observatory in Alexandria, ancient Egypt. Coloured historical artwork of Claudius Ptolemy (AD c100-170), an Egyptian or Greek astronomer, geographer and mathematician, surrounded by astronomical equipment. Among the instruments seen are Ptolemy's rulers (lower centre) and a copper disc (far right), which he used to demonstrate the law of reflection. At this observatory Ptolemy made the observations that supported Earth-centred models of solar and planetary motion. This view dominated astronomical thinking until the mid 16th century. Engraving from the 19th century book Vies des Savants Illustres.
May 8th, 2013
Viewed 11 Times - Last Visitor from Redlands, CA on 12/25/2014 at 2:59 AM
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