"Lux Aeterna" is a Latin phrase meaning "eternal light." It is often used in religious contexts, particularly in Christian liturgy, to refer to the everlasting light of God or the hope of eternal life after death. The phrase appears in various prayers and hymns, emphasizing the theme of divine illumination and spiritual guidance. In addition to its liturgical use, "Lux Aeterna" is also the title of a well-known composition by composer György Ligeti. This piece, characterized by its ethereal sound and complex vocal harmonies, gained prominence after being featured in the film 2001: A Space Odyssey. Ligeti's work explores themes of transcendence and the sublime, resonating with the concept of eternal light.