Yes, it's an excerpt from Mike Oldfield's Incantations. The video is from a compiled movie which celebrated NASA and is called "The Space Movie". You can buy a dvd of it.
The actual part of it that the ABC used can be seen here on YouTube:
http://www.youtube.com/watch?v=3OhRJf4VFgU
My sister and I used to race in to watch it when we heard it come on.