Telescope mount for 1874 transit of Venus

Numéro d’image : 11555335
Telescope mount for 1874 transit of Venus
Telescope mount for 1874 transit of Venus. This altazimuth telescope mount was used in obsevations of the 1874 transit of Venus from the Kerguelen Archipelago in the southern Indian Ocean. An altazimuth is used to measure the altitude (from the horizon) and azimuth (angle from north) of a celestial body. The transit of Venus occurs twice every 113 years. Several expeditions were organised to different locations to observe the 1874 transit. The combined results helped established the distance of Venus and the Sun from the Earth,and hence the size of the solar system
Licence : Droits gérés
Crédit: Science Photo Library / Royal Astronomical Society
Taille de l’image : 4606 px × 3845 px
Model Release : Non requis
Property Release : Non requis
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