Voyager Probes Nearing Termination Shock

Mr. Eradicator writes "The Voyager probes are continuing their journey away from the Solar System at a pace of 10 AU per year. They won't reach the heliopause until 2017, but they could arrive at a preliminary boundary called the termination shock as early as 2005. The termination shock, nearly 4 billion miles inside the heliopause, is where the solar wind first starts to slow down and reverse due to its first encounters with pressure from interstellar space."