An irregular galaxy is a galaxy that does not have a distinct regular shape, unlike a spiral or an elliptical galaxy. Galaxies are classified according to their shape. Irregular Galaxy Most galaxies can be categorized by their shape. Irregular Galaxies are galaxies that have no regular structure, unlike spirals and ellipticals, and lack any discernible nucleus or spiral structure. It's part of the M94 Group (or Canes Venatici I Group), a galaxy group close to the Local Group.With an apparent magnitude of +9.4, it's within binocular range but challenging. On the other hand, spiral galaxies have a spiral shape. 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. Also, in some irregular galaxies, like M82, young stars eject energetic bubbles gas, giving the galaxy a blobby look. The irregular galaxy is one of three types of galaxies. Reflections Vocabulary. An extremely small number of them, however, are red and have a smooth, though nonsymmetrical, shape.

GALEX Team/Caltech/NASA/STScI M82 (NGC 3034), irregular galaxy in … They have neither noticeable symmetry nor an obvious central nucleus, and they are generally bluer in colour than are the arms and disks of spiral galaxies.
An irregular galaxy is a galaxy that does not have a distinct regular shape, like a spiral or an elliptical galaxy. Graphic Organizer: Comparison of spiral, elliptical, and irregular galaxies.

The Large Magellanic Cloud (LMC) is an irregular-shaped galaxy in the Local Group. Sagittarius Dwarf Irregular Galaxy The Large Magellanic Cloud is another galaxy, very similar to NGC 4449, that has a pronounced central bar, and probably started as a Barred Spiral, and became disrupted by interactions with the Milky Way and the Smaller Magellanic Cloud; see picture to the right.


You may already be familiar with the galaxies: spiral, barred spiral, elliptical and irregular. It is called an irregular galaxy. Get Adobe Reader. When they were formed through gravitational interaction, the tidal forces were strong enough to eliminate all identified structure of what galaxy type it may have been previously. Elliptical galaxies. About 13 billion years old. The smaller galaxy pushes galactic materials outwards and creates a ring shape in the larger galaxy. The Large Magellanic Cloud (LMC) is an irregular-shaped galaxy in the Local Group. Teacher PDF (126KB) As presented below. Irregular II Galaxies (Irr II): The second type of irregular galaxy does not have any feature what so ever. By Admin.