Astral Canticle is a double concerto for violin, flute, and orchestra by the American composer Augusta Read Thomas. The work was Thomas's sixth and final commission by the Chicago Symphony Orchestra before she concluded her nine-year tenure there as composer-in-residence. It was first performed in Chicago on June 1, 2006, by the flutist Mathieu Dufour, the violinist Robert Chen, and the Chicago Symphony Orchestra under the conductor Daniel Barenboim. The piece is dedicated to Barenboim and the Chicago Symphony Orchestra. The composition was a finalist for the 2007 Pulitzer Prize for Music.