Animation showing how celestial and geographic coordinates are mapped on an astrolabe's tympan through a stereographic projection. Hypothetical tympan (40° north latitude) of a 16th-century European planispheric astrolabe.

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Animation showing how celestial and geographic coordinates are mapped on an astrolabe's tympan through a stereographic projection. Hypothetical tympan (40° north latitude) of a 16th-century European planispheric astrolabe.
Astrolabe Maritime Navigation Instrument #planispheric #mariners #astrolabe #maritime #sea #navigation #instrument (at Qatar National Library مكتبة قطر الوطنية) https://www.instagram.com/p/BwZidaHlJi8/?utm_source=ig_tumblr_share&igshid=joh7dfpv328l