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Size (left) and distance (right) of a few well-known galaxies put to scale. There are an estimated 100 billion galaxies in all of the observable universe. [1] On the order of 100,000 galaxies make up the Local Supercluster, and about 51 galaxies are in the Local Group (see list of nearest galaxies for a complete list).
A galaxy is a system of stars, stellar remnants, interstellar gas, dust, dark matter, bound together by gravity. The word is derived from the Greek galaxias, literally 'milky', a reference to the Milky Way galaxy that contains the Solar System.
Lists of galaxies. List of galaxies; List of largest galaxies; List of galaxies with richest globular cluster systems; List of nearest galaxies; List of galaxies named after people; List of spiral galaxies; List of polar-ring galaxies; List of ring galaxies; List of quasars; Satellite galaxies. List of satellite galaxies of the Milky Way
Starflight is a space exploration, combat, and trading role-playing video game created by Binary Systems and published by Electronic Arts in 1986. Originally developed for IBM PC compatibles, it was later ported to the Amiga, Atari ST, Mac, and Commodore 64.
This list uses the mean cosmological parameters of the Lambda-CDM model based on results from the 2015 Planck collaboration, where H 0 = 67.74 km/s/Mpc, Ω Λ = 0.6911, and Ω m = 0.3089. [3] Due to different techniques, each figure listed on the galaxies has varying degrees of confidence in them.
This is a list of known galaxies within 3.8 megaparsecs (12.4 million light-years) of the Solar System, in ascending order of heliocentric distance, or the distance to the Sun. This encompasses about 50 major Local Group galaxies, and some that are members of neighboring galaxy groups , the M81 Group and the Centaurus A/M83 Group , and some ...
Apart from the Milky Way, only 4 galaxies are visible to the naked eye. [15] Centaurus A/M83 Group: 2 The Centaurus A galaxy has been spotted with the naked eye by Stephen James O'Meara [16] [17] and M83 has also reportedly been seen with the naked eye. [18] M81 Group: 1 Only Bode's Galaxy (M81, NGC 3031) is visible to the naked eye. [15] [19]
The following is a list of NGC objects, that is objects listed in the New General Catalogue (NGC). It is one of the largest comprehensive astronomical catalogues for deep sky objects such as star clusters, nebulae, and galaxies. List of NGC objects (1–1000) List of NGC objects (1001–2000) List of NGC objects (2001–3000)