LOL, it's headed "out there". I'm not sure of what's in that direction other than nothing for a few million years.
You are correct, it is not solar powered, it is powered by a radiothermal generator converting heat from the decay of Plutonium into electricity. As such, the amont of heat (and therefore electricity) is decreasing over time, and it will run out of power in about 10 years. There's a topic about it in Missions and Launches. I'll stick a link here in a few minutes when I find it.
In that thread is also a link to the NASA Voyager Website.