The New General Catalog (NGC) is a catalog of deep-sky objects compiled by John Louis Emil Dreyer in 1888. It contains 7,840 entries, including galaxies, star clusters, nebulae, and other objects.

The Messier Catalog is a catalog of 110 deep-sky objects compiled by Charles Messier in the 18th century. It contains a variety of objects, including nebulae, star clusters, and galaxies, but its primary purpose was to identify and catalog nebulae.

The Hubble Deep Field is a series of images taken by the Hubble Space Telescope in 1995. It is known for its deep images of the universe, revealing faint galaxies and other distant objects.

The Sloan Digital Sky Survey (SDSS) is a project that aims to map the universe in three dimensions. It is primarily known for its cataloging of galaxies, but it also includes data on stars, quasars, and other objects.

The Abell Catalog is a catalog of galaxy clusters compiled by George Abell in 1958. It contains 2,712 galaxy clusters, making it one of the most extensive collections of galaxy clusters.

The Zwicky Catalog is a catalog of galaxies compiled by Fritz Zwicky in the 1960s. It contains over 30,000 galaxies, making it one of the largest catalogs of galaxies.

The Hickson Compact Group Catalog is a catalog of compact groups of galaxies compiled by Paul Hickson in 1982. It contains 100 compact groups of galaxies, each containing between 4 and 16 galaxies.

The Shapley-Ames Catalog is a catalog of galaxies compiled by Harlow Shapley and Adelaide Ames in 1932. It contains 1,249 galaxies with unusual shapes, such as barred spirals, elliptical galaxies, and irregular galaxies.

The Veron-Cetty and Veron Catalog is a catalog of galaxies with active galactic nuclei (AGN) compiled by Monique Veron-Cetty and Pierre Veron in 1985. It contains over 10,000 galaxies with AGN.

The Uppsala General Catalog (UGC) is a catalog of galaxies compiled by the Uppsala Observatory in Sweden. It contains over 12,000 galaxies, making it one of the largest catalogs of galaxies.

The Arp Catalog is a catalog of galaxies with peculiar morphologies compiled by Halton Arp in 1966. It contains 338 galaxies with unusual shapes, such as interacting galaxies, galaxies with tidal tails, and galaxies with multiple nuclei.

The Third Reference Catalog of Bright Galaxies (RC3) is a catalog of the brightest galaxies in the universe. It contains over 20,000 galaxies with a visual magnitude brighter than 15.5.

The Markarian Catalog is a catalog of galaxies with high surface brightness compiled by Benjamin Markarian in 1963. It contains over 1,500 galaxies with a high surface brightness in the ultraviolet.

The LEDA Catalog is a catalog of galaxies compiled by the Lyon-Meudon Extragalactic Database (LEDA). It contains over 1 million galaxies, making it one of the largest catalogs of galaxies.

The Malin 1 Catalog is a catalog of galaxies with low surface brightness compiled by David Malin in 1983. It contains over 1,000 galaxies with a low surface brightness in the visible.