File:Beijing Ancient Observatory 91043.jpg
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[edit]DescriptionBeijing Ancient Observatory 91043.jpg |
English: Ecliptic Armilla. Qing Dynasty, 1673. Ancient Observatory, Beijing
The armillary rings are joined to each other and to the frame in a way that allows the armilla to be turned in any direction. Its sighting bar is in the center, and its readout (observation) scale is marked on the thick supporting arc at the bottom. This instrument measures the ecliptic latitude and angle from the sun of a celestial body. It also measures the "24 solar terms," which were a division of the year into 24 equal parts based on the summer and winter solistices. |
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Author | G41rn8 |
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current | 19:34, 7 December 2015 | ![]() | 2,592 × 1,944 (2.23 MB) | G41rn8 (talk | contribs) | User created page with UploadWizard |
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