BWV_Anh._9
Entfernet euch, ihr heitern Sterne (Disperse yourselves, ye stars, serenely!), BWV 1156 (formerly BWV Anh. 9),[1] is a birthday cantata by Johann Sebastian Bach.[2] He composed it in Leipzig to celebrate the 57th birthday of the Elector of Saxony, King Augustus II the Strong,[3] and it was performed for him on his birthday, 12 May 1727, on the Markt square of Leipzig, by students of the University of Leipzig,[4] with Bach directing.[3] The king was also presented with the work's libretto, written by Christian Friedrich Haupt.[3]
The music to this secular birthday cantata by Bach is lost.[2][3] It has been speculated from the surviving libretto, however, that several movements from the Mass in B minor are derived from it. A reconstruction has been created using the music of the Mass.
The cantata is counted among Bach's works for celebrations of the Leipzig University, Festmusiken zu Leipziger Universitätsfeiern.[5]