What would extraterrestrials think of the waltz? This was the question that came to mind on a recent Saturday evening. The Vienna Symphony Orchestra performed Johann Strauss’s famous “Blue Danube” waltz. At the same time, a large antenna in Cebreros, Spain, sent the music into space. The Vienna Tourist Board put on the event. It was held at the Museum of Applie...

The "Blue Danube" waltz by Johann Strauss II has finally reached the stars. This event took place on a Saturday. A large radio antenna in Spain, operated by the European Space Agency, sent the waltz into the cosmos. The antenna was pointed at Voyager 1, the farthest spacecraft from Earth, which is over 15 billion miles away. The music, traveling at the speed of l...