Astronomy Practice Exam 2026 – Complete Preparation Guide

The typical appearance of an irregular galaxy is characterized by a chaotic and irregular shape, which aligns with the characteristics observed in many known examples of such galaxies. Unlike spiral or elliptical galaxies, which have more defined and organized structures, irregular galaxies lack a clear form or symmetry. They often appear fragmented and are usually the result of gravitational interactions or collisions with other galaxies, leading to their disordered appearance. This lack of structure can manifest as a variety of shapes and sizes, without the organized arms of spiral galaxies or the smooth contours of elliptical galaxies. The diversity in their morphology is what distinguishes irregular galaxies and contributes to the broader understanding of galaxy formation and evolution.