2:1 Resonance

A 2:1 resonance occurs when two objects, such as planets or moons, orbit a common center at frequencies that are in a simple ratio—specifically, one completes one orbit for every two orbits of the other. This synchronized pattern leads to repeated gravitational influences at the same points in their orbits, which can stabilize their motions or cause significant gravitational interactions. Such resonances help explain the regular spacing of some natural satellites and planetary orbits, and they demonstrate how gravitational forces can create harmony and order in a complex system.