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The Local Group is the galaxy group that includes the Milky Way, where Earth is located. It has a total diameter of roughly 3 megaparsecs (10 million light-years ; 9 × 10 19 kilometres ), [ 1 ] and a total mass of the order of 2 × 10 12 solar masses (4 × 10 42 kg). [ 2 ]
The Local Group is a member of the supercluster, but not the cluster. Most distant galaxy group Nearest galaxy group Local Group: 0 distance This is the galaxy group that our galaxy belongs to. Nearest neighbouring galaxy group IC 342/Maffei Group: Most distant proto-cluster A2744z7p9OD: z=7.88 [23] Nearest proto-cluster Most distant massive ...
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).
The radial velocity of IC 10 was measured in 1962, and it was found to be approaching the Milky Way at approximately 350 km/s, strengthening the evidence for its membership in the Local Group. [5] Its membership in the group was finally confirmed in 1996 by direct measurements of its distance based on observations of Cepheids; most estimates ...
Local Group: Isolated member at the edge of the local group 11,500 ly 103 Andromeda XIX [72] dSph [55] 3.043 0.933 −9.3 Local Group: Satellite of Andromeda, spread over 1.7 kpc 2,200 ly 105 Andromeda XXII [68] dSph [55] 3.219 0.987 18.0 Local Group: Satellite of Andromeda 106 Aquarius Dwarf Galaxy (DDO 210) Im V 3.22 [51] 0.988 [51] −11.09 ...
Groups are the most common structures of galaxies in the universe, comprising at least 50% of the galaxies in the local universe. Groups have a mass range between those of the very large elliptical galaxies and clusters of galaxies. [5] Our own galaxy, the Milky Way, is contained in the Local Group of more than 54 galaxies. [6]
In 1963, Geoffrey Burbidge and Margaret Burbidge identified a group of five background galaxies located northeast of NGC 247. [8] This grouping came to be known as Burbidge's Chain, and in 1977 it was listed in the VV catalog as VV 518. [9] Individually, the 5 galaxies are also identified as NGC 247A, NGC 247B, NGC 247C, NGC 247D, and ESO 540-025.
Messier 110, or M110, also known as NGC 205, is a dwarf elliptical galaxy that is a satellite of the Andromeda Galaxy in the Local Group. [ 9 ] Early observational history