Orbital resonance occurs when two orbiting bodies exert regular, periodic gravitational influence on each other due to their orbital periods being related by a ratio of small integers. This phenomenon can lead to significant effects on their orbits, such as stabilizing or destabilizing them. For example, the moons of Jupiter, like Io and Europa, are in a 1:2 resonance, meaning for every orbit Io completes, Europa completes two. Resonance can also be observed in the Kirkwood gaps of the Asteroid Belt, where certain distances from the Sun are devoid of asteroids. These gaps occur because asteroids at those distances are influenced by the gravitational pull of Jupiter, which creates resonances that clear out those regions over time.