Surface features refer to the visible characteristics of a landscape or object. In geography, this includes mountains, valleys, rivers, and plains, which shape the Earth's terrain. These features can be formed by natural processes like erosion, weathering, and tectonic activity, influencing ecosystems and human activities. In astronomy, surface features describe the characteristics of celestial bodies, such as the Moon or Mars. These can include craters, valleys, and volcanoes, which provide insights into the body's history and geological processes. Studying these features helps scientists understand the formation and evolution of planets and moons in our solar system.