Symphonies of the Planets.

Be prepared to experience a new dimension of our Solar System through the most exciting journey ever undertaken by humankind. The epic space flights of Voyager I & II across our Solar System. This unique series of recordings (5 volumes) is created from original Voyager recordings of the electromagnetic "voices" of the planets and moons in our Solar System. Although space is a virtual vacuum, this does not mean there is no sound in space. Sound does exist as electronic vibrations. The specially designed instruments on board the Voyagers performed special experiments to pick up and record these vibrations, all within the range of human hearing.
This is really fantastic and surreal stuff.
Part 1
Part 2