Voyager 1 hears the hush of interstellar plasma
It's pretty wild that this probe, launched 44 years ago (1977) and now well beyond the solar system, can still take novel measurements and transmit information back. At that range, our  sun looks roughly like any other star. The nuclear radioisotopic thermal generator really is an incredible power source for this kind of application. Some info on the current design here [1].<p>[1] <a href="https://mars.nasa.gov/internal_resources/788/" rel="nofollow">https://mars.nasa.gov/internal_resources/788/</a>