This theme was used for Kublick's film "A Space Oddessy". It's by Rickard Strauss and is called "Also Sprach Zarathustra'(Trans; Thus Spoke Zarathustra) It's a tone poem on the book by Nietsche, German philosopher. After the opening theme it seems to meander and I have never been able to listen to it all. (U might have to check my spelling on the names)