Irregular Galaxy

    There is only one property that determines an irregular galaxy from anything else - a collection of space matter that doesn't resemble an elliptical or spiral galaxy. It also lacks a bulge at the center and has no definitive traces of a spiral arm structure. Amazingly, these celestial bodies make up about one fourth of all known galaxies.
   Under this blanket statement, there are two classifications - Irr I and Irr II. The former (Irregular I) has young stars, gases, and dust; while an Irregular II looks as if other galaxies have collided together.
   Magellanic Cloud Galaxies have been classified as dwarf irregular galaxies, but having been found to contain barred spiral structures, they have been re-categorized as spirals.
There is not much known about Irregular galaxies, due to the amount of random star clumps in the universe.
    Below is an image of the Dwarf Irregular Galaxy, NGC6822.