Gravity as a Leak Current A source mass on the left drives a dense dc1 current rightward against a counter-rotating boundary layer. The layer is a near-perfect mirror: almost the entire incident current is reflected back, and only a single thin thread — about one dc1 particle in ten quadrillion — transits to reach a distant boundary on the right, delivering the net momentum we feel as gravity. The transit fraction is f_cross = 4 pi G / v_rot,outer, approximately 1.1e-15, which is why gravity is so weak. Gravity as a Leak Current Inside a boundary layer two opposing currents nearly cancel — only about one dc1 particle in a quadrillion transits, and that thread is gravity. M source mass trapped rotational energy incident dc1 current ≈ all of it reflected back counter-rotating boundary layer ≈ neutral zone the leak: net dc1 current carries momentum fcross ≈ 1.1 × 10−15 of the flux gets through m distant boundary F = GMm / r² Of every ~1015 dc1 particles that strike a boundary, about one transits. The layers are near-perfect mirrors — that is the whole reason gravity is weak.