Concept information
Terme préférentiel
astrolabe
Définition(s)
- An astrolabe is an Arabic and medieval European sighting instrument on an altazimuth mounting, used to show the appearance of the celestial sphere at a given moment and to determine the elevation above the horizon of celestial objects. It comprises two or more flat, metal, calibrated disks, one with a star map and one or more others with a scale of angles around its rim, attached so that both or all can rotate independently; the modern equivalent is the planisphere. For early navigators and astronomers it served as star chart, compass, clock, and calendar. As a navigational device it was eventually replaced by the sextant. (Encyclopedia of Science, by David Darling, https://www.daviddarling.info/encyclopedia/A/astrolabe.html)
Concept(s) générique(s)
Concept(s) spécifique(s)
Traductions
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français
URI
http://data.loterre.fr/ark:/67375/MDL-HSNSWSJK-V
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