Interstellar Mission of Voyager 1
On 12 September 2013, it was announced that the Voyager 1 spacecraft, at 126 astronomical units (1 AU is the average Earth-Sun distance), is now in interstellar space, but still within the Solar System. It crossed the termination shock of the Sun’s magnetic field in 2004. The Sun’s gravity actually extends much farther and holds comets that are nearly 100,000 AU from our star, in what is called the Oort Cloud. At its current speed, it would take Voyager 1, which was launched on 5 September 1977, some 28,000 years to leave the Solar System.