New General Catalog
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New General Catalogue of Nebulae and Star Clusters
New General Catalogue of Nebulae and Star Clusters (NGC)
An important catalog of nebulae, star clusters, and galaxies, the original version of which was published in Ireland in 1888 under the authorship of John Dreyer. The NGC 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 William Herschel. Additional objects were listed in two Index Catalogues (IC). The current version of the NGC and IC, known as NGC2000, 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.
An important catalog of nebulae, star clusters, and galaxies, the original version of which was published in Ireland in 1888 under the authorship of John Dreyer. The NGC 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 William Herschel. Additional objects were listed in two Index Catalogues (IC). The current version of the NGC and IC, known as NGC2000, 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.
New General Catalog (NGC), standard reference list of nebulae (see nebula). It is based on the General Catalog, published in 1864, which included 2,500 nebulae cataloged by William Herschel and an additional 2,500 cataloged by his son, John Herschel. The General Catalog was combined with work of other observers and the resulting total of more than 7,800 entries was published as the New General Catalog of Nebulae by J. Dreyer in 1888. This work was updated by publication of two Index Catalogs (IC), in 1895 and 1910. More than 13,000 objects are listed in these works, of which more than 12,000 are extragalactic nebulae (galaxies). Some nebulae listed in the NGC are also listed in the Messier catalog, e.g., the Andromeda Galaxy is listed both as NGC 224 and as M31.
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categories related to 'New General Catalogue'
- Branches, Laws, Theories, and Techniques - New General Catalogue: NGC; listing of galaxies, clusters, and nebulae that includes all Messier objects, numbered from NGC1
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