What type of galaxy is a result of collisions and has an irregular structure?

An irregular galaxy is characterized by a lack of a distinct, regular shape, which is often the result of gravitational interactions and collisions with other galaxies. These collisions can disrupt the orderly structure commonly found in spiral and lenticular galaxies, leading to the chaotic arrangement of stars, gas, and dust observed in irregular galaxies.

This irregular structure can also comprise a wide range of stellar populations and regions of active star formation, further emphasizing the dynamic and complex nature of these galaxies. The absence of symmetry and structure makes irregular galaxies unique among galaxy types, with their formation closely tied to past galactic interactions.