Great Astronomers: William Parsons (3rd Earl of Rosse) - Ball Robert Stawell
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William Parsons, the 3rd Earl of Rosse, (1800–1867) was an
Anglo-Irish astronomer who made several large telescopes. His
72-inch telescope, the "Leviathan", built in 1845, was the world's
largest telescope until the early 20th century.The 72-inch (1.8 m)
telescope replaced a 36-inch (910 mm) telescope that he had built
previously. He had to invent many of the techniques he used for
constructing the Leviathan, both because its size was without
precedent and because earlier telescope builders had guarded their
secrets or had simply failed to publish their methods. Rosse's
telescope was considered a marvelous astronomical and engineering
achievement. Lord Rosse performed astronomical studies and
discovered the spiral nature of some nebulas. He named the Crab
Nebula. A main component of Rosse's nebular research was attempting
to resolve the nebular hypothesis, which posited that planets and
stars were formed by gravity acting on gaseous nebulae.
(https://en.wikipedia.org/wiki/William_Parsons,_3rd_Earl_of_Rosse)
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