William Parsons, Triangulum Galaxy, 1850

by Science Source

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William Parsons, Triangulum Galaxy, 1850

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Science Source

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Photograph - Photograph

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Observations on the Nebulae by the Earl of Rosse (1850) Messier 33. Philosophical Transactions of the Royal Society of London. William Parsons, 3rd Earl of Rosse (June 17, 1800 - October 31, 1867) was an Anglo-Irish astronomer. He inherited an earldom and a large estate in King's County, Ireland when his father Lawrence Parsons, 2nd Earl of Rosse died in 1841. There he performed astronomical studies and discovered the spiral nature of some nebulas, today known to be spiral galaxies. His 72-inch telescope, Leviathan, built 1845, was the world's largest telescope until the early 20th century. His telescope was the first to reveal the spiral structure of M51, the Whirlpool Galaxy, and his drawings of it closely resemble modern photographs. He named the Crab Nebula, based on an earlier drawing made with his older 36-inch telescope in which it resembled a crab. A few years later, when the 72-inch telescope was in service, he produced an improved drawing of considerably different appearance, but the original name continued to be used. He served as a Member of Parliament for King's County from 1821-34, president of the Royal Society (1848-54), and chancellor of Trinity College, Dublin (1862-67). He died in 1867 at the age of 67.

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August 4th, 2019

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