IRREGULARGALAXY

Irregular galaxy

An irregular galaxy is a galaxy that does not have a distinct regular shape, unlike a spiral or an elliptical galaxy. The shape of an irregular galaxy is uncommon – they 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. Collectively they are thought to make up about a quarter of all galaxies. Most irregular galaxies were once spiral or elliptical galaxies but were deformed by disorders in gravitational pull. Irregular galaxies may contain abundant amounts of gas and dust. This is not necessarily true for Dwarf Irregulars.

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irregular galaxy

Noun

  1. A galaxy which is has no spirals and is not elliptical.
    The Magellanic Clouds are irregular galaxies.


The above text is a snippet from Wiktionary: irregular galaxy
and as such is available under the Creative Commons Attribution/Share-Alike License.

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