The historical image, from 1551, is a demonstration of how to determine a longitudinal location by using the lunar distance method. From Cosmographicus liber by Petrus Apianus (1495-1552), also known as Peter Apian, a German humanist known for his works in mathematics, astronomy and cartography.

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Petrus Apianus, Determining Longitude, 1551

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Size: 5481px × 3861px
Location:
Photo credit: © Science History Images / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 1495-1552, 1551, 16th, angles, apianus, art, century, cosmographia, cosmographicus, demonstration, determine, determining, diagram, distance, historical, history, image, liber, location, longitude, longitudinal, lunar, man, measuring, method, navigation, navigational, person, petrus