I worked on the Voyager project back in 74-75, when it was actually called Mariner Jupiter Saturn, so I've taken an interest in this.
It was on this day in 1977 that the Voyager 2 spacecraft was launched. Voyager 2 and its twin, Voyager 1, set out to explore the giant gaseous planets -- Jupiter, Saturn, Uranus, and Neptune. They did that, and they are still in space, releasing new data constantly. Voyager 2's newest discovery concerns the bubble around our solar system where the solar wind (a thin gas of charged particles, which come from the sun) meets the space beyond our solar system. Voyager 2 has shown that that bubble is irregular, or squashed, not round.
Just in case the Voyagers make it into another solar system with alien life forms, each Voyager has a record that is three-quarters music and one-quarter greetings in 55 languages and various sounds from nature. The music includes Beethoven, Chuck Berry, Louis Armstrong, and traditional songs from all over the world.