Parsons, William

Parsons, William:

see Rosse, William Parsons, 3d earl ofRosse, William Parsons, 3d earl of
, 1800–1867, British astronomer and constructor of telescopes. He served as member of Parliament for King's Co.
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Parsons, William


(Third Earl of Rosse). Born June 17, 1800, in York; died Oct. 31, 1867, in Monkstown, Ireland. Irish astronomer. Member (1831) and president (1849–54) of the London Royal Society.

In 1845, Parsons constructed a reflecting telescope with a 182-cm mirror, which he set up at Birr Castle in Ireland. Using this telescope, he established the spiral structure of many extragalactic nebulae. Parsons was a member of the Royal Astronomical Society (1824) and a foreign member of the St. Petersburg Academy of Sciences (1852).


”An Account of Experiments on the Reflecting Telescope.” Philosophical Transactions, 1840, part 1, pp. 503–28.
”On the Construction of Specula of Sixfect Aperture and a Selection From the Observations of Nebulae With Them.” Philosophical Transactions, 1861, vol. 151, part 1, pp. 681–745.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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