William Parsons. Portrait of British astronomer and obsessive telescope-maker William Parsons (1800-67),3rd Earl of Rose. Parsons' "Leviathan" telescope of 1845 had a six foot diameter mirror. His studies of nebulae were valuable,but the climate of Birr Castle limited observational work | |
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Crédit: | Science Photo Library |
Taille de l’image : | 3515 px × 4984 px |
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