Home > John Dreyer

He was born Johan Ludvig Emil Dreyer in Copenhagen. In 1874, at the age of 22, he went to Ireland to work as the assistant of Lord Rosse (the son and successor of the Lord Rosse who built the "Leviathan of Parsonstown" telescope). In 1878 he went to Dunsink Observatory and in 1882 to Armagh Observatory , where he served as director until 1916.

His major contribution was the monumental New General Catalogue of Nebulae and Clusters of Stars, whose catalogue numbers are still in wide use today, as well as two supplementary Index Catalogues.

He wrote a biography of Tycho BraheTycho Brahe ( December 14, 1546 October 24, 1601) was a Danish nobleman, well known as an astronomer/ astrologer (the two were not yet distinct) and alchemist. He had Uraniborg built, which became an early " research institute". For purposes of publicatio.

He won the Gold Medal of the Royal Astronomical SocietyThe Gold Medal is the highest award of the Royal Astronomical Society. In the early years, more than one medal was often awarded in a year, but by 1833 only one medal was being awarded per year. This caused a problem when Neptune was discovered in 1846, b in 1916. A craterThis article is about impact craters. For volcanic craters, see Caldera. For the constellation, see Crater (constellation). A crater basin or impact crater is a circular depression on the surface of a planet, moon, asteroid, or other celestial body. Crate on the MoonFor other moons in the solar system see natural satellite. For other uses see Moon (disambiguation). The Moon is the only natural satellite of Earth. It has no formal name other than "The Moon" although it is occasionally called Luna ( Latin for moon to d is named after him.