Radio broadcasts leave Earth at the speed of light and travel outwards into space. Follow them through the Milky Way as you scroll backwards through time and listen to what the stars hear.
Built using Three.js. Taking a look at the source code reveals all tracks used.
And oh, don’t forget the “Inverse Square Law of Propagation”:
Although Lightyear.fm has radiowaves reaching over 100 lightyears into space, due to the Inverse Square Law of Propagation, any terrestrial radio broadcast would become nothing but background noise just a few light years away from Earth.