English composer Gustav Holst composed The Planets between 1914 and 1916. The Birmingham premiere of the suite took place in 1918, fifteen years before Pluto was discovered. Though the Planets became by far the most popular work of Holst's and one of the most known pieces by an English-born composer, Holst did not consider the piece one of his finest. Partially because of this, he never wrote an eighth movement, though unexpectedly the IAU relegated Pluto from its status as planet proper in 200