The Planets dedication notwithstanding, Imogen Holst "would have been both amused and dismayed by the venture." On 24 August 2006, the International Astronomical Union (IAU) defined what it means to be a "planet" within the Solar System. This definition excluded Pluto as a planet and added it as a member of the new category of "dwarf planets", along with Eris and Ceres. Following the IAU decision, Kenyon D. Wilson composed a trombone quintet piece titled "Songs of Distant Earth". The title comes from Arthur C. Clarke's novel of the same name. The composition contains five movements, each named after one of the
Suite (music) dexterity from the pianist. Arnold Schoenberg's first use of the twelve-tone technique throughout an entire work was in his Suite for Piano, op. 25. Modeled on the Baroque keyboard suite, the piece consists of six movements entitled "Präludium" (Prelude), "Gavotte", "Musette", "Intermezzo", "Menuett" (Minuet, with Trio), and "Gigue". Other famous examples of early 20th-century suites are "The Planets" by Gustav Holst, a 'Suite for Orchestra' in which each piece represents the astrological significance of one of the seven uninhabited planets then known, as well as his First Suite in E-flat and Second Suite in F for Military Band. There are