Planetary geomorphology is the study of the geological processes that shape the surfaces of planets, moons, and other celestial bodies in our solar system. It involves analyzing the landforms, surface features, and structures present on these bodies to understand their formation and evolution over time. By studying planetary geomorphology, researchers can gain insights into the past and present geological processes that have shaped the surfaces of planets such as Mars, Venus, and Earth's moon, as well as moons of other planets like Europa and Titan. This research area helps scientists better understand the geologic history of these bodies, as well as the potential for past or present habitability.