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File:Instruments d'observation du Jantar Mantar (Jaipur) (8486475665).jpg

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Français : Au fond, le Laghu Samrat Yantra, au premier plan, une partie d'un des deux hémisphères du Jai Prakash Yantra.

Le Laghu Samrat Yantra est construit en grès rouge et en marbre, c'est un double cadran solaire dont le gnomon en escalier est incliné de 27° (latitude de Jaipur).

Le Jai Prakash Yantra est un instrument qui sert à la vérification des relevés des autres instruments et des calculs effectués. Il est composé de deux hémisphères concaves en marbre de 5,5 m de diamètre qui représentent la voute céleste inversée. L'instrument peut être utilisé de jour (grâce à l'ombre du soleil qui se projette sur les surfaces de marbre) comme de nuit (en ce cas, on observe à l’œil les étoiles ou les planètes à travers le trou central).

Le Jantar Mantar à Jaipur est un observatoire astronomique, qui a été bâti en 1728-1733 à la demande du maharaja Jai Singh II (1688-1743), grand amateur d'art, féru d'astronomie et d'architecture. Les instruments de mesure d'origine hindoue sont tous en maçonnerie.

www.jantarmantar.org/
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Source Instruments d'observation du Jantar Mantar (Jaipur)
Author Jean-Pierre Dalbéra from Paris, France
Camera location26° 55′ 29.33″ N, 75° 49′ 27.66″ E Kartographer map based on OpenStreetMap.View this and other nearby images on: OpenStreetMapinfo

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This image was originally posted to Flickr by dalbera at https://www.flickr.com/photos/72746018@N00/8486475665. It was reviewed on 9 December 2014 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0.

9 December 2014

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current15:23, 16 December 2014Thumbnail for version as of 15:23, 16 December 2014746 × 1,004 (420 KB)Lomita (talk | contribs)Suppression cadre
16:22, 9 December 2014Thumbnail for version as of 16:22, 9 December 2014768 × 1,024 (642 KB)Medium69 (talk | contribs)Transferred from Flickr via Flickr2Commons

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