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. The sundial (1790) was designed primarily to determine the time according to the sun.

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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, dial, historical, instrument, measurement, measuring, observatory, sun, sundial, time