Planetary geophysics is a field of study that focuses on understanding the physical properties and processes that occur on planets, moons, and other celestial bodies in our solar system and beyond. This includes the study of the internal structure, composition, and dynamics of planets, as well as the interactions between their atmospheres, surfaces, and interiors. Researchers in planetary geophysics use a variety of techniques, such as remote sensing, geophysical modeling, and laboratory experiments, to investigate the geology, geophysics, and tectonics of planetary bodies. This field is important for understanding the origins and evolution of planets, as well as for predicting and mitigating natural hazards such as earthquakes, volcanic eruptions, and climate change on Earth and other planets.