In 1977, electronic music composer Laurie Spiegel's music headed into space. "Harmonices Mundi," which she created using 17th Century astronomer Johannes Kepler's concept of music based on planetary rotation, became part of the Voyager "golden record," designed to represent Earth's inhabitants if it should ever be found by extraterrestrials. As Voyager 1 passes through the edge of the solar system, Pitchfork has profiled Spiegel, who has spent decades creating ground-breaking electronic music, developing her own software, and making prescient predictions about how the future would look and sound.