Some works, deemed complete by the composer, are nonetheless augmented for non-musical reasons. In May 2000 composer Colin Matthews premiered his "completion" of Gustav Holst's "The Planets", whereby he composed a new movement for the ninth planet Pluto, giving it the name "Pluto, The Renewer". When Holst had written the original piece Pluto had not been discovered, and this addition therefore updated the suite to represent all known planets of the solar system (Earth was never included), 82 years after it was originally performed. In August 2006 Pluto was officially demoted to a dwarf planet, meaning that Holst's original work now more accurately represents the solar system.