That task wrapped up within a little more than a decade, but still the spacecraft trek outward: currently, Voyager 2 is more than 13 billion miles from Earth, and Voyager 1 is more than 15.5 ...

The twin spacecraft launched in 1977 and are currently in interstellar space, or the space between stars. Voyager 1 discovered a thin ring around Jupiter and several of Saturn’s moons ...