 Of the major spacecraft, "Voyager 1", "Voyager 2", and "New Horizons" are still functioning and are regularly contacted by radio communication, while "Pioneer 10" and "Pioneer 11" are now derelict.In addition to these spacecraft, some third stages and de-spin weights are leaving the Solar System, assuming they continue on their trajectories.These objects are "leaving" the Solar System because their velocity and direction are taking them away from the Sun, and at their distance from the Sun, its gravitational pull is not sufficient to pull these objects back or into orbit.