List of largest galaxies

Below is a list of the largest galaxies so far discovered by size.

The order of this list is speculative, for the following reasons:

List

List of the largest galaxies
Galaxy Size (ly/pc) Type Description
IC 1101 5,800,000 ly (1,800,000 pc) ± 800,000 ly (250,000 pc)[1] E3 Once reported in the late 1980s with an extremely large size, detailed analysis of its stellar halo finally reduced it to half of its original value.
NGC 262
(Markarian 348)
2,600,000 ly (800,000 pc)
(H I halo)
S0-a The huge neutral hydrogen halo of this galaxy makes it large; the stellar diameter of this galaxy is only 88,000 light-years.
BCG of Phoenix Cluster 2,200,000 ly (670,000 pc) E3 Massive elliptical starburst galaxy
300 other Abell cluster BCGs >1,000,000 ly (310,000 pc)
Milky Way Galaxy 100,000 ly (31,000 pc) SBc The home galaxy of humankind. The galaxy that contains the Solar System.
Reported for reference

Angular size

Apparent area

List of the galaxies with the largest visual areas
Galaxy Size
(square arcminutes)
Type Description
Andromeda Galaxy 7200 [NB 1][2] SA(s)b [3] With apparent dimensions of 190'×60' ; Andromeda is the galaxy with the largest apparent size [2][3]

Apparent diameter

List of the widest visual galaxies
Galaxy Size (arcseconds) Type Description
Andromeda Galaxy 9000[NB 2][4] SA(s)b [3] With apparent dimensions of 190'×60' ; Andromeda is the galaxy with the largest apparent size [3][4]

Notes

  1. 2 square degrees
  2. 2.5 degrees

References

  1. http://sciencegaveuslot.com/ic-1101-largest-galaxy-known-in-universe/
  2. 1 2 Kenneth Glyn Jones (1991). Messier's Nebulae and Star Clusters. Cambridge University Press. p. 7. ISBN 9780521370790.
  3. 1 2 3 4 "NED results for object MESSIER 031". NASA/IPAC Extragalactic Database.
  4. 1 2 Rudolf Kurth (22 October 2013). Introduction to Stellar Statistics. International Series of Monographs in Natural Philosophy 10 (Pergamon Press). p. 5. ISBN 9781483184951.

See also

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