An astronomer with his astrolabe, an illustration from the Nuernberg Chronicles of the World, published in 1493. The astrolabe was a primitive type of

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An astronomer with his astrolabe, an illustration from the Nuernberg Chronicles of the World, published in 1493. The astrolabe was a primitive type of instrument used, in the form shown here, to measure the altitudes of stars (their angular heights above the horizon). The altitude of a standard star could be used to determine the time of night.

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Size: 3821px × 4667px
Photo credit: © DR JEREMY BURGESS/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: astrolabe, astronomical, astronomy, equipment, historical, history, instrument