The Large Magellanic Cloud, a small irregular spiral galaxy orbiting the Milky Way.

An irregular spiral galaxy (also known as a Magellanic spiral galaxy, after the Magellanic clouds which are examples of this classification) is a galaxy that has some spiral structure, but is irregular in appearance, with no central bulge. Because of their irregular shape, they are often compared to irregular galaxies in structure; often the two groups are considered to be equivalent.

Some examples of irregular spiral galaxies in our universe include the Large Magellanic Cloud, NGC 55 and NGC 3109.

Galactic Classes
E · S0 · SA · SB · SM · Irr
dSph · dE · dIrr