"oyager 1 has three large radioisotope thermoelectric generators (RTGs) mounted end to end on a boom. Each MHW-RTG contains 24 pressed plutonium-238 oxide spheres. The 2,400 watts of heat from the spheres generated about 157 watts of electric power per RTG at the launch, with the remainder being dissipated as waste heat. Hence there was a total of about 470 watts of electric power provided by the three RTGs.
The power output of the RTGs does decline over time (halving every 87.7 yrs), but the RTGs of Voyager 1 will continue to support some of its operations until around 2025"
nem atomreaktor, de majdnem ;) véleményem szerint egy ilyen út során pont a villamos energia termelése az ami már megoldott réges rég. A több viszont komoly kihívás.