Planetary impacts is a research area that focuses on studying the effects that collisions between celestial bodies have on planets and other astronomical bodies. These impacts can range in scale from small meteorite strikes to large asteroid or comet collisions that can have significant impact on a planet's geology, atmosphere, and potential for life. Researchers in this field study the processes involved in a planetary impact, including the mechanics of the collision, the energy released, and the resulting effects on the impacted body. They also study the history of impacts on various planets and moons in our solar system, using features like impact craters to understand the frequency and intensity of past impact events. Overall, the study of planetary impacts plays a crucial role in our understanding of the formation and evolution of planets and other celestial bodies, as well as in assessing the potential risks posed by impact events to Earth and other planets in our solar system.