|Launch of Voyager 1.|
Source: Wikimedia Commons.
Voyager 1 and its partner Voyager 2 were initially launched to survey the outermost planets in our solar system: Jupiter, Saturn, Uranus, and Neptune. Voyager 2 is nowhere near the edge of the solar system however, because after it was finished with the outer planets in 1989 it was put on a much slower course than Voyager 1.
According to researchers, Voyager 1 should cross the threshold outside of our solar system sometime in the next five years, so this story will definitely be coming up in the news again in the future.