Earth gravity models

Earth gravity models are scientific representations that describe how gravity varies across the planet’s surface and interior. Because Earth's density isn't uniform—due to mountains, oceans, and underground structures—gravity differs slightly in different locations. These models use data from satellites, aircraft, and ground measurements to map these variations, providing precise information for navigation, climate studies, and understanding Earth's internal structure. In essence, they help us understand the subtle differences in gravitational pull that occur around the world, improving our ability to study and interact with our planet accurately.