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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 4449, also known as Caldwell 21, is an irregular Magellanic type galaxy in the constellation Canes Venatici, being located about 13 million light-years away. [3] It is part of the M94 Group or Canes Venatici I Group that is relatively close to the Local Group hosting our Milky Way galaxy.
Elliptical and lenticular galaxies are commonly referred to together as "early-type" galaxies, while spirals and irregular galaxies are referred to as "late types". This nomenclature is the source of the common, [ 18 ] but erroneous, belief that the Hubble sequence was intended to reflect a supposed evolutionary sequence, from elliptical ...
This category contains galaxies in the Irr-I, Irr-II, dI, Sm and Im categories. Dwarf galaxies may be categorized under Category:Dwarf irregular galaxies The main article for this category is Irregular galaxy .
UGC 8508 is a dwarf irregular galaxy located about 8.5 million light-years away from Earth in the constellation of Ursa Major. [1] It is sometimes classified as a member of the M101 Group of galaxies and has a diameter of around 4.2 kly (1.29 kpc). As an irregular galaxy, UGC 8508 does not exhibit any large scale organization in its structure.
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 1569 is a dwarf irregular galaxy in Camelopardalis. The galaxy is relatively nearby and consequently, the Hubble Space Telescope can easily resolve the stars within the galaxy. [3] The distance to the galaxy was previously believed to be only 2.4 Mpc (7.8 Mly). [4]
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 .