Ganymede is a large natural satellite orbiting Jupiter, making it the largest moon in the solar system by mean diameter. Its surface exhibits a complex mixture of heavily cratered terrains and vast, smoother regions composed primarily of icy materials. Geologically, the moon is theorized to have a substantial subsurface ocean beneath its icy shell, making it a subject of intense study regarding potential habitability. Due to its significant size and orbital mechanics, its gravitational influence and interior structure are key areas of physical investigation, classifying it among the most scientifically significant celestial bodies within the Jovian system.