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Ancient astronomical instruments.

Ancient astronomical instruments.

C034/4695

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Credit

MARK WILLIAMSON / SCIENCE PHOTO LIBRARY MARK WILLIAMSON / SCIENCE PHOTO LIBRARY

Caption

A display of historical Chinese astronomical instruments on the roof of the Beijing Ancient Observatory in Beijing, China, an astronomical observatory that dates from the 1400s. From left to right: azimuth theodolite (1715) to determine azimuth and altitude (elevation angle) of celestial objects; altazimuth (1673) to determine the azimuth of celestial objects; ecliptic armilla (1673) to measure ecliptic longitude difference and latitude of celestial objects.

Release details

Model release not required. Property release not required.

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