File:Beijing Ancient Observatory 20090715-20.jpg
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Exhibition description: Guo Shoujing Guo Shoujingwas a scientist and astronomer during the Yuan Dynasty. He worked on establishing several astronomical observatories and also devised a number of astronomical instruments, including an adapted version of the armillary, and an improved version of the gnomon and the Hemispherium sundial. He also formulated the Shoushi Calendar - which calculated the year to be 365.2425 days. This calendar was the calendar used for the longest period in Chinese history. |
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| Source | Own work |
| Author | Hans A. Rosbach |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 06:11, 4 August 2009 | | 5,616 × 3,744 (4.17 MB) | Haros (talk | contribs) | {{Information |Description=Exhibition description: Guo Shoujing Guo Shoujingwas a scientist and astronomer during the Yuan Dynasty. He worked on establishing several astronomical observatories and also devised a number of astronomical instruments, includi |
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