What if ring particles marked the edge of Earth's gravitational domain? An inner system circles at lunar distance while an outer band of 18,000 particles sits just inside the sphere-of-influence boundary with respect to the Sun — the distance beyond which solar gravity dominates over Earth's. For Earth, this boundary lies near 925,000 km (about 2.4 lunar distances). Ring particles at this edge would be tugged alternately by Earth and the Sun, creating a dynamically fragile structure. The scenario visualises a fundamental concept in celestial mechanics: every body has a finite zone where its gravity wins over the central star's pull.