Schematic illustration of the diverse pathways of a constellation of N_tot tumbling solar sails traveling over a distance L through the turbulent magnetized ISM (left panel) and the expected value of the perihelion distance as a function of travel distance (right panel). As shown in the left panel, dispersive hydrodynamic and magnetic drag lead to a sideways drift, 4SM, and a dispersion in time of arrival, δt, at the Sun. The expected value E(d_ISM) (dashed gray circle) is generally much larger than the targeted Oumuamua’s perihelion distance, p_o. In the right panel, the expected value of the perihelion distance, E(p_⊙) (solid lines), is shown as a consequence of deflection after traveling over a distance L through the ISM with a number density n_ISM. The probability of a single light sail striking the Solar System at a distance p_⊙ ≤ p_O (represented by a solid dot) from the Sun is shown with dashed lines.