Great Melbourne Telescope,1868

Numéro d’image : 11879820
Great Melbourne Telescope,1868
Great Melbourne Telescope,Melbourne,Australia,1868 artwork. This reflector telescope,completed in 1868,had a mirror 122 centimetres in diameter with a focal length of 9. 3 metres. Its equatorial mount moved it to compensate for the rotation of the Earth and follow an object across the sky. The skeleton tube framework (6. 4 metres in length) had spiral strips and rings for increased strength and freedom from tremor. The pulleys at the observer's end moved a mirror at the other end,to focus the image. It was used to observe the skies of the Southern Hemisphere. In the 1940s it was broken up to provide parts for other telescopes. Artwork published in the London Illustrated News
Licence : Droits gérés
Crédit: Science Photo Library / Bernard, George
Taille de l’image : 3117 px × 4515 px
Model Release : Non requis
Property Release : Non requis
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