Gravitational stability refers to the balance of gravitational forces that keeps celestial bodies, like planets and moons, in stable orbits. When the gravitational pull of a larger body, such as a star or planet, is strong enough to keep smaller objects in a consistent path, those objects are said to be gravitationally stable. This stability is crucial for maintaining the structure of solar systems and galaxies. In a gravitationally stable system, any disturbances, such as collisions or changes in mass, can lead to adjustments in orbits. For example, the Earth remains in a stable orbit around the Sun due to the balance between gravitational attraction and its orbital velocity. This stability allows for predictable patterns in celestial movements.