teRminatiOn sHoCk !

'Termination Shock' is the the out most edge of our solar system and Voyger 2 will pass beyond it into the interstellar space some time next year. :-) coool

"Scientists determined that Voyager 1 was approaching the termination shock when it began detecting charged particles that were being pushed back toward the Sun by charged particles coming from outside our solar system. This occurred when Voyager 1 was about 85 AU from the Sun.

In contrast, Voyager 2 began detecting returning particles while only 76 AU from the Sun.

"This tells us that the shock down where Voyager 2 is must be closer the sun than where Voyager 1 is," said Ed Stone, Voyager project scientist at the California Institute of Technology in Pasadena." - Space.com, >>READ MORE

One AU is the distance between the Earth and the Sun, or 93 million miles.