Revision history of "The Observatory at Dengfeng"

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  • curprev 02:03, 24 March 2010‎ imported>Ciic‎ 989 bytes +989‎ Created page with 'Established by the Yuan astronomer Guo Shoujing (1231-1316), the observatory is the oldest of its kind in China. It has three parts: the body, the stone sundial and g...'
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