Impact ejecta refers to the material that is ejected from a planetary surface during an impact event, such as a meteorite impact or volcanic eruption. This material can include rocks, minerals, and other debris that are thrown out from the impact site and scattered across the surrounding area. Studying impact ejecta can provide valuable information about the nature and dynamics of impact events, as well as the geological history of a planetary surface. Researchers analyze the composition, distribution, and physical characteristics of impact ejecta to better understand the processes involved in impact events and their effects on planetary surfaces. Additionally, studying impact ejecta can help scientists to identify and study impact craters, which can provide important insights into the history of planetary bodies.