In an irregular galaxy, you would expect to find:
1. Poorly defined substructures: Irregular galaxies often lack the symmetrical, well-defined shapes seen in spiral or elliptical galaxies. They can have irregular shapes and structures due to gravitational interactions with other galaxies.
2. Primarily made up of old stars: Irregular galaxies typically contain a mix of old and young stars. While they can have areas of active star formation where new stars are being born, they are generally characterized by a higher proportion of older stars compared to other types of galaxies.
3. Areas of active star formation: Irregular galaxies can exhibit regions where new stars are actively forming. These areas are often associated with regions of gas and dust that provide the necessary ingredients for star formation to occur. The presence of young, hot stars in these regions can contribute to the overall appearance and dynamics of an irregular galaxy.
