Micrometre instrument used to measure features on the lunar pictures of the British astronomer Warren De la Rue (1815-1889).

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Photo credit: © ROYAL ASTRONOMICAL SOCIETY/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 19th, astronomical, astronomy, black--white, century, de, equipment, historical, history, instrument, la, lunar, measurement, measuring, micrometre, monochrome, moon, research, rue, science, warren