File:Globe Celeste Louvre Asturlabi DSC 0713.JPG

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Français : Globe céleste, Isfahan (?), Iran, 1144. Signé Yunus b.al-Husayn al-Asturlabi.

Bronze gravé incrusté d'Argent, exposé au Musée du Louvre - MAO 824 - salle B - vitrine 44


Instrument d'étude et de mesure, un astrolabe sphérique est un modèle tridimensionnel des cieux. Celui-ci est le 3e plus ancien conservé au monde.

Il porte les 48 constellations identifiées par le Grec Ptolémée à Alexandrie au 2e siècle. Les 1025 étoiles sont signalées par des points d'argent dont la taille varie en fonction de la brillance observée de l'astre. L'inscription gravée par Yunus dit qu'il refit les calculs de coordonnées en tenant compte du temps écoulé depuis l’œuvre de Ptolémée.
English: Celestial Globe, Isfahan (?), Iran, 1144. Signed Yunus b.al-Husayn al-Asturlabi.

Shown at the Louvre Museum. Engraved bronze inlaid with silver. A spherical astrolabe is a three dimensional model of the universe for observation and measurement. This globe, the 3rd oldest surviving in the world, shows the 48 constellations identified by the Greec Ptolemy in Alexandria. The 1025 stars are represented by silver dots that vary in size according the the observed brightness of each one.

The inscription states that Yunus recalculated the coordinates taking into account the lapse of time between Ptolemy's work and his own
العربية: اسطرلاب فارسي، من صنع يونس ب. الحسين الأسطرلابي سنة 1144 متحف اللوفر باريس
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current23:29, 4 February 2013Thumbnail for version as of 23:29, 4 February 20133,872 × 2,592 (2.08 MB)Captainm (talk | contribs)Améliorations des couleurs - teinture jaunatre
21:35, 4 February 2013Thumbnail for version as of 21:35, 4 February 20133,872 × 2,592 (2.78 MB)Captainm (talk | contribs)User created page with UploadWizard

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