Atmospheric escape refers to the process by which gases in a planet or moon's atmosphere are lost into space. This phenomenon is particularly relevant in planetary science and astronomy, as understanding atmospheric escape can provide insights into the evolution and habitability of different celestial bodies. There are several mechanisms through which atmospheric escape can occur, including thermal escape, non-thermal escape, and photochemical escape. These processes are influenced by factors such as a planet's gravity, magnetic field, and proximity to its host star. Studying atmospheric escape can help scientists better understand the evolution of planetary atmospheres, the potential for habitability on other planets, and the impact of space weather on atmospheric loss. Researchers use a variety of observational and modeling techniques to investigate atmospheric escape, including satellite missions, ground-based observations, and computer simulations.