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John Frederick William Herschel fue un matemático y astrónomo inglés, hijo del astrónomo William Herschel. John Herschel popularizó el uso de la fecha juliana en astronomía e inventó la cianotipia. Acuñó los términos «fotografía», «negativo», «positivo» y descubrió el uso del tiosulfato de sodio como fijador de las sales de plata.
31 de mar. de 2018 · Lived 1792 – 1871. John Herschel was a polymath - a brilliant mathematician, astronomer, chemist, and inventor. He produced the first global survey of the night skies, discovered hundreds of nebulae and thousands of double stars, invented the actinometer to measure the heating power of radiation, invented hypo fixing of photographs, and invented the cyanotype,
On January 1, 1840, a strange ceremony took place in the garden of the Herschel house at Slough. On the lawn lay the 40-foot-long tube of the great reflector that William Herschel had first pointed at the heavens half a century earlier. The instrument had been out of use for over thirty years, and the enormous wooden framework from which the ...
John Herschel was the son of William Herschel, the astronomer who discovered Uranus. His mother Mary Pitt was the daughter of a wealthy merchant. She was 38 years old when she married William Herschel, her first husband and her only child having both died. When John Herschel was born in 1792 William was 55 years old and Mary was 42.
24 de ago. de 2023 · Il contributo di Sir John Herschel alla cura degli occhi . Combinando le sue conoscenze sulle lenti e sulla riflessione della luce, nel 1827 John Herschel propose uno dei primi design al mondo di lenti a contatto e condusse altre ricerche sulla vista, tra cui: Studi su diverse irregolarità corneali e sull’astigmatismo
12 de may. de 2021 · Born on 7 March 1792 at Observatory House, Slough, John Herschel was the only child of William and Mary Herschel. His childhood was an eclectic mix of local schooling and private tuition, especially in mathematics at which he excelled. His famous comet-hunting aunt, Caroline Herschel (1750–1848), lived nearby and the pair remained close ...
22 de jul. de 2021 · Nace William Herschel en Hannover. Su padre le proporciona formación musical antes de enviarlo a Inglaterra. 1772. Caroline se traslada a Inglaterra para vivir con sus hermanos. Allí asiste a William en sus estudios astronómicos. 1781. William descubre Urano y se ve lanzado al éxito.
