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Automatische Übersetzung:
Spiral galaxy, Messier 99, from Observations on the Nebulae, by William Parsons, 1850. 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. 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. (cropped and cleaned)