http://en.wikinews.org/wiki/Voyager_1_enters_heliosheath_at_edge_of_solar_system The Voyager 1 spacecraft, launched in 1977 to explore the planets, is now agreed by scientists to have entered the heliosheath at the edge of the solar system 8.7 billion miles (14 billion kilometers) from the Sun. In a few years, Voyager 1 is expected to become the first man-made object to cross into interstellar space. "Voyager has entered the final lap on its race to the edge of interstellar space, as it begins exploring the solar system's final frontier," said Dr. Edward Stone, Voyager project scientist at the California Institute of Technology. As long ago as 2003, scientists thought Voyager 1 was entering the termination shock region of the solar system, but there was some dispute. The termination shock is the area preceding the heliosheath, where the electrically charged solar wind is slowed and concentrated by contact with interstellar gas. The heliosheath is considered the outer edge of our solar system. Around it is the heliopause, a cosmic bubble where the pressure of solar wind and interstellar wind is in balance. The solar system as a whole is in orbit around the center of the Milky Way galaxy. As it plows through clouds of interstellar gas and dust, a bow shock (I'm pretty good with the bow staff.) forms ahead of it, which has been compared to the turbulence a ship creates as it sails through ocean currents. Voyager 1 is still operational and sending back reams of scientific data. Already notable for more than 27 years of successful operation, Voyager 1 is projected to continue operating on its plutonium power source until 2020.