Sujet
Sir John Herschel, astronomer and scientist, 1810s. Artist: Gaspare Gabrielli
Légende
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.
Oxford Science Archive
Date
1810
Crédit
Photo12/Heritage Images
Notre référence
HRM19B63_090
Model release
Non
Licence
Droits gérés
Format disponible
18,0Mo (1,7Mo) / 18,1cm x 24,9cm / 2136 x 2942 (300dpi)