One of the two Voyager probes launched in the 70’s (and later featuring in the first Star Trek Movie – geek overdrive) is about to leave the Solar System. It is now 10.8 BILLION (10,800,000,000) miles from Earth – and still works thanks to it’s radioactive power supply.
Instruments on board that measure the Solar Wind have begun consistently showing Zero. The particles from the Sun are now being stopped by the particles on interstellar space.
Click the BBC link below for more info and an audio clip from Dr Ed Stone.