The close proximity of stars to each other upon formation clearly involves a high probability for gravitational binding, assuming that astral formations aren't directly driven by binary interactions (which could very well be the case). Intellectually this establishes the basis for a dual-star interaction within our Solar System. It is generally presumed that the Sun is a unique exception to this commonly observed phenomenon, however, observational evidence suggests that the Sun is moving in a defined orbit around a companion system of stars.