Voyager II-Beyond Solar system

From Nature news I came across an interesting news about voyager 2 it goes like this:
“On 30 August, NASA's Voyager 2 spacecraft — which has been sailing through space since 1977 — crossed the 'termination shock', the boundary between the bubble in space dominated by the solar wind coming from the Sun and the transition region beyond that lies between Earth and interstellar space.
Voyager 2's twin, Voyager 1, crossed this same boundary in December 2004. The twin Voyagers headed out of the solar system in different directions, with Voyager 1 taking a northern path and Voyager 2 a southern one.
Radioactive generators aboard each spacecraft, powering their electrical systems, may allow them to transmit through the transition and beyond.
Voyager 1 is currently nearly 10 billion miles from the Sun, traveling nearly a million miles a day. Voyager 2 is nearly 8 billion miles away and moving just slightly slower. ”