Deep Sky Objects
Explore deep sky objects including galaxies, nebulae, star clusters, and more from the NGC, IC, Messier, and Caldwell catalogs.
NGC Catalog
New General Catalogue
The NGC catalog contains thousands of deep sky objects discovered in the 18th and 19th centuries, including galaxies, nebulae, and star clusters.
Browse NGC ObjectsIC Catalog
Index Catalogue
The IC catalog supplements the NGC with additional deep sky objects discovered in the late 19th and early 20th centuries.
Browse IC ObjectsMessier Catalog
Charles Messier's Collection
110 of the brightest and most spectacular deep sky objects, perfect for amateur astronomers and easily visible with small telescopes.
Browse Messier ObjectsCaldwell Catalog
Patrick Caldwell-Moore's List
109 deep sky objects carefully selected for amateur astronomers, including many southern hemisphere objects not in the Messier catalog.
Browse Caldwell ObjectsQuick Object Search
Search by object designation (NGC, IC, M, C) or common name.