Gas Giant Dynamics

Jupiter and Saturn shaped the early solar system through gravitational sculpting. The Grand Tack hypothesis proposes that Jupiter migrated inward and then outward early in the solar system's history, scattering material and preventing a super-Earth from forming in the inner solar system.

Jupiter's gravity carves gaps in the asteroid belt through orbital resonances — locations where an asteroid's orbital period syncs with Jupiter's, nudging it out over time. Both giant planets also help sweep up debris, shielding the inner planets from some potential impacts.