Giant impacts refer to a type of collision event that occurs between celestial bodies, such as planets, moons, or asteroids, which results in a significant amount of material being ejected and/or merged together. These events can have profound effects on the structure, composition, and evolution of the bodies involved, and are thought to have played a key role in the formation and evolution of our solar system. Studying giant impacts can provide insights into the processes that have shaped the planets and other objects in our solar system, as well as help us understand the dynamics of planetary systems in general.