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An irregular galaxy is a galaxy that does not have a distinct regular shape, unlike a spiral or an elliptical galaxy. [1] Irregular galaxies do not fall into any of the regular classes of the Hubble sequence , and they are often chaotic in appearance, with neither a nuclear bulge nor any trace of spiral arm structure. [ 2 ]
NGC 6822 (also known as Barnard's Galaxy, IC 4895, or Caldwell 57) is a barred irregular galaxy approximately 1.6 million light-years away in the constellation Sagittarius. Part of the Local Group of galaxies, it was discovered by E. E. Barnard in 1884, with a six-inch refractor telescope .
NGC 1313 (also known as the Topsy Turvy Galaxy [2]) is a field galaxy [3] and an irregular galaxy [4] discovered by the Scottish astronomer James Dunlop on 27 September 1826. [5] It has a diameter of about 50,000 light-years , or about half the size of the Milky Way .
English: This Hubble Picture of the Week features NGC 2814, an irregular galaxy that lies about 85 million light years from Earth. In this image, which was captured using Hubble’s Advanced Camera for Surveys (ACS), the galaxy appears to be quite isolated: visually, it looks a little like a loose stroke of bright paint across a dark background.
NGC 6745 (also known as UGC 11391) is an irregular galaxy about 206 million light-years (63.5 mega-parsecs) away in the constellation Lyra. It was discovered by French astronomer Édouard Stephan on 24 July 1879. [4] NGC 6745 is actually a trio of galaxies in the process of colliding. The three galaxies have been colliding for hundreds of ...
Dwarf galaxies may be categorized under Category:Dwarf irregular galaxies The main article for this category is Irregular galaxy . Wikimedia Commons has media related to Irregular galaxies .
The dwarf galaxy Sculptor C is located about 6.65 million light-years (2.04 megaparsecs) away from the Sun, and is very likely a satellite galaxy of NGC 300. Sculptor C has an absolute magnitude of about −9.1 which is typical for other recently discovered ultra-faint dwarf galaxies.
LEDA/PGC 16389 is a Hubble-type dwarf irregular galaxy (dIrr) in the constellation Caelum in the southern sky. It is estimated to be 22 million light-years from the Milky Way and forms an optical galaxy pair with APMBGC 252+125-117.