This. Is. Wild. From gigwise.com:
NASA put up special instruments which recorded electromagnetic vibrations on the Voyager space probe and converted that into actual sound. The recordings include the sounds of Saturn’s rings, Neptune, Jupiter and Uranus as well as what Earth would sound like millions of kilometres away.
Listen to a compilation of the eerie sounds here:
NASA has released a huge library of recorded sounds, everything from rockets to space shuttles to individual planets. You can listen at the NASA SoundCloud page.