[This article originally appeared in print as "Interstellar Man."] Stone had come of age just as NASA ... at a distance of 9 billion miles from Earth. Voyager 2, pointing almost 90 degrees away from ...

The main concern revolved around the spacecraft's roll thrusters, which ensure its antenna remains pointed at Earth. Since 2004, Voyager 1 has ... Voyagers are the only man-made objects that ...