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Nonius (device)
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Nonius is a measuring tool used in navigation and astronomy named in honour of its inventor, Pedro Nunes, a Portuguese author, mathematician and navigator. The nonius was created in 1542 as a system f
Pedro Nunes Nonius model
Pedro Nunes Nonius model
Astrolabe
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An astrolabe is an astronomical instrument dating to ancient times. It serves as a star chart and physical model of the visible half-dome of the sky. Its various functions also make it an elaborate in
Nonius (device)
…author, mathematician and navigator. The nonius was created in 1542 as a system for taking finer measurements on circular instruments such as the astrolabe. The system was eventually adapted into the Vernier scale in 1631 by the French mathematician Pierre Vernier. The nonius was used to improve the…
North African, 9th century ce, planispheric astrolabe. Khalili Collection.
North African, 9th century ce, planispheric astrolabe. Khalili Collection.
A modern astrolabe made in 2013, in Tabriz, Iran.
A modern astrolabe made in 2013, in Tabriz, Iran.
16th-century woodcut of the measurement of a building's height with an astrolabe
16th-century woodcut of the measurement of a building's height with an astrolabe
A modern reconstruction of the spherical astrolabe of Ptolemy, 2nd C.E., in Kotsanas Museum of Ancient Greek Technology, Athens.
A modern reconstruction of the spherical astrolabe of Ptolemy, 2nd C.E., in Kotsanas Museum of Ancient Greek Technology, Athens.