New General Catalogue of Nebulae and Star Clusters (NGC)
The New General Catalogue of Nebulae and Star Clusters (NGC) is an important catalogue of nebulae, star clusters, and galaxies, the original version of which was published in Ireland in 1888 under the authorship of John Dreyer. It contained 7,840 northern-sky objects and was a revised and enlarged version of the General Catalogue of Nebulae and Clusters published in 1864 by John Herschel. Additional objects were listed in two Index Catalogues. The current version of the NGC and IC catalogues, known as NGC.2000, covers the entire sky and provides data on more than 13,100 objects. Errata compiled by Dreyer and by subsequent workers have been incorporated into the new version and the object types have been updated with information from modern astronomy; descriptions given by Dreyer (often cryptic) have been retained.