When the moon passes between Earth and the sun on August 21, there will be nothing to hear—just the silence of three celestial objects briefly aligning, then continuing on their way. To Exploratorium composer Wayne Grim, however, that silent passing is an opportunity to make music unlike any other. Find out how. To hear the Kronos performance of Grim’s sonification, tune in to the Exploratorium's eclipse website (http://explo.me/DlU130euWZB) or our free Total Solar Eclipse app on the morning of