Sir John Herschel, English astronomer and scientist, 19th century.

Gabrielli, Gaspare

 
Sir John Herschel, English astronomer and scientist, 19th century.
4 0 c m
 
28cm
actual image size: 20cm x 32cm

Description

Engraving by G Gabrielli. Sir John Herschel (1792-1871) discovered 525 nebulae and clusters. He pioneered celestial photography, discovering the cyanotype or blueprint proces in 1842, and carried out research on photo-active chemicals and the wave theory of light. Published in 1875.

© Science Museum / Science & Society Picture Library

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