Most galaxies are spiral, spherical or ellipsoidal aggregations of stars, but some have irregular configurations. These unusual objects may very well be galaxies in an early stage of evolution ...

which were once classified as irregular galaxies, but have since been found to contain barred spiral structures. Among other types in Hubble's classifications for the galaxies are the spiral galaxy, ...

Galaxies are classified into elliptical, lenticular, and spiral (or barred spiral) galaxies. Galaxies with irregular shapes ...