impactor

An impactor is an object that creates a collision or impact with another surface, often used in scientific experiments or space missions. For example, in planetary research, impactors are spacecraft or devices sent to collide with a celestial body to study its composition, surface features, or to create controlled impacts for research purposes. The force of the impact can reveal important information about the target, such as its internal structure, density, or the presence of hidden layers. Essentially, impactors are tools used to investigate or modify surfaces by intentionally causing impacts for scientific study.