Launched in 1977, Voyager 1 & 2 were to visit Jupiter and Saturn. They accomplished their mission with Voyager 2 flying by Neptune. Both Voyager 1 & 2 are expected to have power and fuel to 2020.

Voyager 1 & 2 are expected to cross over the threshold of our solar system into interplanetary in 2015

So, here’s my musical tribute to Voyager 1 & 2 from the Grateful Dead-  Keep on Truckin’