John Herschel

Yes, John Herschel was the son of William Herschel, the German-British astronomer who discovered the planet Uranus in 1781. John continued and extended his father's work in astronomy, particularly in cataloging nebulae and double stars. He also made significant contributions to chemistry and is credited with coining the term 'photography' in 1839.

John Herschel traveled to the Cape of Good Hope (in present-day South Africa) from 1834 to 1838 to survey the southern celestial hemisphere, which had not been systematically cataloged by European astronomers. From his observatory at Feldhausen, he cataloged over 1,700 nebulae, star clusters, and double stars visible only from southern latitudes. His observations were published in his 1847 'Results of Astronomical Observations Made at the Cape of Good Hope.'

John Herschel made several critical contributions to early photography, including coining the terms 'photography,' 'positive,' and 'negative' in 1839. He discovered the use of sodium thiosulfate (hypo) as a photographic fixer, which dissolves unexposed silver halides and makes images permanent. This chemical process was adopted by both William Henry Fox Talbot and Louis Daguerre for their respective photographic processes.

John Herschel's observations formed the foundation of the New General Catalogue (NGC), compiled by J.L.E. Dreyer in 1888. Many of the NGC entries originated from Herschel's catalog of nebulae and star clusters, which expanded upon his father William Herschel's earlier catalogs. The NGC remains one of the most widely used deep-sky object catalogs in amateur and professional astronomy today.