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May 9, 2024 · Sir John Herschel, 1st Baronet (born March 7, 1792, Slough, Buckinghamshire, England—died May 11, 1871, Collingwood, Kent) was an English astronomer and successor to his father, Sir William Herschel, in the field of stellar and nebular observation and discovery. Early life. An only child, John was educated briefly at Eton and then privately.
May 8, 2024 · Summary. Despite John Herschel’s extensive work in the fields of chemistry, optics, geology, mineralogy, and the philosophy of science, it was primarily as an astronomer that he was recognized during his lifetime and remembered after his death. Herschel’s astronomical endeavors can be summarized as establishing and extending the ...
May 1, 2024 · In 1842, Herschel created a new photographic printing technique using ammonium iron citrate and potassium ferricyanide that could produce blue images on paper or fabric when exposed to light. The blue was a product of a reaction that formed ferric ferrocyanide — also known as Prussian blue.
4 days ago · The NGC expanded and consolidated the cataloguing work of William and Caroline Herschel, and John Herschel's General Catalogue of Nebulae and Clusters of Stars. Objects south of the celestial equator are catalogued somewhat less thoroughly, but many were included based on observation by John Herschel or James Dunlop .
May 28, 2024 · One additional interesting fact, Betelgeuse is a semiregular pulsating variable star first noticed by Sir John Herschel in 1836. When at maximum, Betelgeuse sometimes rises to magnitude 0.4 when it rivals the star Rigel (Beta Orionis).
4 days ago · 1840: John Herschel invents the blueprint. 1841: Alexander Bain devises a printing telegraph. 1842: William Robert Grove invents the first fuel cell. 1842: John Bennet Lawes invents superphosphate, the first man-made fertilizer. 1844: Friedrich Gottlob Keller and, independently, Charles Fenerty come up with the wood pulp method of paper production.
May 19, 2024 · Catalogue of 500 New Nebulae, Nebulous Stars, Planetary Nebulae, and Clusters of Stars, 1802. General Catalogue of Nebulæ and Clusters of Stars ( GC ), Sir John Herschel, 1864. The supplement to his father's catalog, which contains 5079 object entries.
