Lagrangian points

Lagrangian points are specific positions in space near two large celestial bodies, like the Earth and the Moon, where the gravitational pull of both bodies and the orbital motion of an object balance perfectly. This creates regions where an object, such as a satellite, can stay relatively stationary relative to the two bodies with minimal fuel. There are five such points, labeled L1 through L5, each with unique properties. They are useful for placing satellites for observation, communication, or scientific research because they require less energy to maintain position.