Johan Ludwig Emil Dreyer

Dreyer, JohanLudvigEmil (1852–1926)Danishastronomer, known also as John Louis Emil Dreyer. He moved to Ireland in 1874 to work, originally at Lord Rosse's observatory, and later compiled the New General Catalogue (NGC) and its supplements, the two Index Catalogues (IC). Also a historian of astronomy, Dreyer edited the scientific papers of William Herschel and wrote a biography of his childhood hero, Tycho Brahe.

Johan Ludwig Emil Dreyer , 1852-1926, Danish astronomer, b. Copenhagen, who worked in Great Britain. He was assistant astronomer at the earl of Rosse's observatory, Parsonstown (now Birr), Ireland (1874-78), and at the observatory of the Univ. of Dublin (1878-82) and director (1882-1916) of the observatory at Armagh. He compiled the standard New General Catalogue of Nebulae and Clusters of Stars (1888; supplements, 1895, 1908), wrote a biography of Tycho Brahe (1890) and History of the Planetary Systems from Thales to Kepler (1906), and edited Second Armagh Catalogue of 3,300 Stars (1886), the scientific papers of Sir William Herschel (1912), and the first volumes of the collected works of Tycho Brahe (15 vol., 1913-29).