[ProtectOurFreedom]

My Dad led the project at GE that developed the Radioisotope Thermal Generators (RTG) on the Voyager spacecraft. I remember seeing some amazing development videos he had and he had great stories to tell about the program. See Voyager Spacecraft Radioisotope Thermoelectric Generators.

The Voyager spacecraft have left the solar system. The most recent news was from December 1, 2017: Voyager 1 Fires Up Thrusters After 37 Years

[MtnClimber]

That is very interesting. Space semiconductors have to have special redundant geometries and memory has to have error checking because cosmic rays can damage logic cells and change the state of memory devices. It usually takes three times the power for a space device compared to one used on Earth.