NASA's Voyager project scientist Ed Stone retires after 50 years
Ed Stone has retired as the project scientist of NASA's Voyager mission, which sent twin probes on a historic "grand tour" of the solar system's giant planets and, much later, out to interstellar space.
![NASA's Voyager project scientist Ed Stone retires after 50 years](http://cdn.mos.cms.futurecdn.net/AyVBXUPgoU4CgqMQokWrga.jpg?#)