Galaxy mergers

Galaxy mergers occur when two galaxies collide and combine due to their gravitational attraction. This process can trigger new star formation, as gas and dust are compressed during the merger. Over time, the galaxies may reshape into a larger, often elliptical galaxy. These events are common in the universe; many galaxies, including our Milky Way, have experienced mergers. Though the vast distances between stars mean they don’t usually collide, the overall gravity influences their motions, leading to complex interactions that can significantly alter their structures and evolution.