One of several historical Chinese astronomical instruments at the Beijing Ancient Observatory in Beijing, China, an astronomical observatory that date

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One of several historical Chinese astronomical instruments at the Beijing Ancient Observatory in Beijing, China, an astronomical observatory that dates from the 1400s. This device, a form of sundial, was used to measure the equinox date; it would have had a gnomon mounted on the pedestal at right. The scale shows an elongated figure of eight.

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Size: 3408px × 5128px
Photo credit: © MARK WILLIAMSON/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 1400, 1400s, 15th, ancient, astronomical, beijing, century., china, chinese, clock, date, dial, equinox, historical, instrument, measurement, measuring, observatory, sun, sundial, time