+- Voyager 2 Just Keeps On Going

The Voyager 2 spacecraft passed through the heliosheath boundary, also called the solar wind termination shock, on August 30, 2007.  A classic example of overdesign, the Plasma Science instrument, radio and power supply (a Radioisotope Thermoelectric Generator using silicon-germanium thermocouples) are among the systems on Voyager 2 still working 30 years after lauch.