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Local Group

Local Group is a proper name referring to the group of galaxies that our galaxy, the Milky Way, is part of. The Local Group is comprised of over 30 galaxies. The gravitational center of the group is located somewhere between the Milky Way and the Andromeda Galaxy. The galaxies of the Local Group cover a 10 million light year diameter (see 1 E23 m for distance comparisons).

The two most massive members of the group are the Milky Way and the Andromeda Galaxy. These two spirals each have a system of satellite galaxies. The Milky Way's satellite system consists of Sag DEG, Large Magellanic Cloud, Small Magellanic Cloud, Ursa Minor, Draco, Carina, Sectans, Sculptor, Fornax, Leo I, Leo II and Tucana. Andromeda's system is comprised of M32, M110, NGC 147, NGC 185, And I, And II, And III and And IV. M33, the third largest galaxy in the Local Group may or may not be a companion to the Andromeda galaxy but probably has LGS 3 as a satellite. The other members of the group are gravitionally secluded from these large subgroups.

  • Indentification Unclear
    • Andromeda IV - Irregular Galaxy or Star Cloud (Irr?) in 1
    • UGC-A 86 (0355+66) - Irregular, Elliptical or Lenticular Galaxy (Irr, dE or S0) in Camelopardalis
    • UGC-A 92 (EGB0427+63) - Irregular or Lenticular Galaxy (Irr or S0) in Camelopardalis

  • Probable non-members
    • NGC 404 - Elliptical or Lenticular Galaxy (E0 or SA(s)0- in Andromeda
    • NGC 1569 - Irregular Galaxy (Irp+ III-IV) in Camelopardalis
    • NGC 1560 (IC 2062) - Spiral Galaxy (Sd) in Camelopardalis
    • Camelopardalis A - Irregular Galaxy (Irr) in Camelopardalis
    • Argo Dwarf - Irregular Galaxy (Irr) in Carina
    • 2318-42 - Irregular Galaxy (Irr) in Grus
    • UKS 2323-326 - Irregular Galaxy (Irr) in Sculptor
    • UGC 9128 (DDO 187) - Irregular Galaxy (Irp+) in Boötes
    • Capricornus Dwarf is a Milky Way Globular Cluster formerly classified as a Dwarf Spheroidal Galaxy
    • Ursa Major Dwarf
    • Sextans C

External links:

  1. The Local Group of Galaxies (http://www.seds.org/messier/more/local), SEDS Messier pages

See Groups and clusters of galaxies

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