The Music of the Spheres
In July of 2004, the Cassini spacecraft arrived at Saturn after seven years of touring the solar system. Among other data, it recorded the radio waves emitted by that planet’s famous rings. Later, those recordings were reduced by a factor of five to bring them into the range of human hearing. This recording is the result. Scientists posit that this is the sound of meteoroids perpetually striking the chunks of ice that make up the rings, like mallets on a marimba, or (more apropos) a needle on the grooves of a gramaphone.