Irregular galaxies do not have a defined shape. They have blank brightness.

Answer 1

Irregular galaxies do not have a defined shape like spiral or elliptical galaxies; instead, they are characterized by their chaotic and asymmetric structures. They often contain a mix of young and old stars, as well as significant amounts of gas and dust. The term "blank brightness" might refer to their varying luminosity, as irregular galaxies can have regions of bright star formation alongside dimmer areas. Overall, their brightness can be quite heterogeneous due to their irregular distribution of stars and materials. If you meant to describe something specific about brightness, please clarify!