how fast is the voyager
Voyager 1, which is zipping along at 38,000 mph (61,000 km/h), is currently 11.7 billion miles (18.8 billion kilometers) from Earth. Voyager 2 took a different route through the solar system and is now 9.5 billion miles (15.3 billion km) from home. Voyager 2 may join its twin in interstellar space three or four years from now, Stone said, stressing that it's tough to predict a departure date in advance. Follow Mike Wall on Twitter @michaeldwall and Google+.