2001: A Space Odyssey (soundtrack) used is Ligeti's "Lux Aeterna" and an electronically altered form of his "Aventures", the last of which was so used without Ligeti's permission and is not listed in the film's credits. Since the film, "Also sprach Zarathustra" has been used in many other contexts. It was used by the BBC and by CTV in Canada as the introductory theme music for their television coverage of the Apollo space missions, as well as stage entrance music for multiple acts including Elvis Presley late in his career. Jazz and rock variants of the theme have also been composed, the most well known
Interpretations of 2001: A Space Odyssey the documentary feelings about everything were necessary in order to undermine your built-in resistance to the poetical concept." When asked by Eric Nordern in Kubrick's interview with "Playboy" if "2001: A Space Odyssey" was a religious film, Kubrick elaborated: I will say that the God concept is at the heart of "2001" but not any traditional, anthropomorphic image of God. I don't believe in any of Earth's monotheistic religions, but I do believe that one can construct an intriguing scientific definition of God, once you accept the fact that there are approximately 100 billion stars in our galaxy alone, that