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Herschel's prismatic apparatus for photogra

Herschel's prismatic apparatus for photogra
2 5 c m
actual image size: 32cm x 17cm


Herschel's prismatic apparatus for photographic researches on the solar spectrum, c 1750. Sir William Herschel (1738-1822), the British astronomer, constructed his own telescope after taking up astronomy as a hobby. As well as discovering the planet Uranus in 1781 and two of its satellites, Herschel performed a major study of Saturn, during which he discovered two satellites, the rotation of the planetary rings and the period ot the planet's rotation. He also catalogued and investigated the motions of binary stars, the results of which are still in use.

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© Science Museum / Science & Society Picture Library

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