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
Brook Green Suite written in 1933, which has full enharmonic relations but remains austere. The final movement, the Dance, is based on a melody heard by Holst while in Sicily. The piece also originally contained a fourth movement, a Gavotte, which was removed after the first informal performance in 1934, the last concert Holst attended. In early 1929, Holst heard a tune during a puppet show and he utilised it in the last movement. Brook Green Suite Gustav Holst's Brook Green Suite, H. 190, was written in 1933 for St Paul's Girls' School junior orchestra for strings and consists of 3 movements. Holst