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Sir John Herschel, astronomer and scientist, 1810s. Artist: Gaspare Gabrielli

Sir John Herschel, astronomer and scientist, 1810s. Portrait of John Herschel as a young man. The son of astronomer Sir William Herschel, John Herschel discovered 525 nebulae and clusters. He pioneered celestial photography, introducing 'hypo' (thiosulphate) as a photographic fixative. He discovered the cyanotype or blueprint process in 1842, and carried out research on photo-active chemicals and the wave theory of light.
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Titre:
Sir John Herschel, astronomer and scientist, 1810s. Artist: Gaspare Gabrielli
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Sir John Herschel, astronomer and scientist, 1810s. Portrait of John Herschel as a young man. The son of astronomer Sir William Herschel, John Herschel discovered 525 nebulae and clusters. He pioneered celestial photography, introducing 'hypo' (thiosulphate) as a photographic fixative. He discovered the cyanotype or blueprint process in 1842, and carried out research on photo-active chemicals and the wave theory of light.
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Crédit:
Album / Oxford Science Archive / Heritage Images
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Modèle: Non - Propriété: Non
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Taille de l'image:
2136 x 2942 px | 18.0 MB
Taille d'impression:
18.1 x 24.9 cm | 7.1 x 9.8 in (300 dpi)
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