The missions of Voyager 2Voyager 2's primary mission was to visit Jupiter, Saturn, and Uranus in 1979, 1981 and 1986. It's been operational for over four decades. After visiting the giant planets, the spacecraft then traveled through the Kuiper Belt, and is now on a mission of interstellar space. NASA maintains contact through its Deep Space Network.
When Voyager stopped transmitting signals showing the particles of the solar wind, scientists knew that it had crossed the boundary of the heliosphere. Within the heliosphere the Sun is dominant. Outside it, there are influences from outside the Solar System - it's a region of the space between the stars.