The original piano solo version was arranged for orchestra. The title is derived from astronomy: Proxima Centauri, the star system located in the constellation Centaurus and the closest stellar system to our solar system. Among the planets orbiting Proxima Centauri, there are believed to be worlds with environments similar to that of Earth, and some have been discussed as potential destinations for human migration in the future. With such a future in mind, the music was composed freely, guided by imagination. The form may be described as a modified sonata form, though it is largely free. Multiple themes converge and give rise to new musical ideas, creating a subtle and organic chemical reaction within the music.