Galaxy interactions refer to the gravitational interactions between two or more galaxies in the vast expanse of space. These interactions can take various forms, including galaxy mergers, tidal interactions, and close encounters. These interactions can dramatically alter the shape, structure, and properties of the galaxies involved, leading to the formation of new stars, gas, and dust structures. Studying galaxy interactions can provide insights into the evolution of galaxies, the formation of structures in the universe, and the role of gravity in shaping cosmic structures.