1. A1 Start... Beginning Of The Universe
2. A2 Comet 1.. Clouds
3. A3 Earth. The Beginning Of Our Solar System
4. A4 Comet 2.. First Appearance At Earth
5. A5 Descending Dance
6. A6 First Chord A Passage Of Time
7. A7 Chord Dance: Dance Of Destruction
8. A8 Low Note Transition To Time Travel
9. A9 Comet 3... Leads Into 12 B.C.
10. A10 12 B.C.
11. A11 Comet 4
12. A12 Comet 5
13. A13 1066
14. A14 Comet 6
15. A15 Giotto
16. A16 Transition
17. A17 1682=Halley
18. A18 Comet 7
19. A19 Crescendo To Coda
20. A20 Coda=Return
21. A21 D Major
22. B1 D Major
23. B2 Building To 18th Century
24. B3 18th Century
25. B4 Transition
26. B5 Building To 19th Century
27. B6 Five Chords
28. B7 19th Century
29. B8 Transition
30. B9 1910
31. B10 Transition
32. B11 1986
33. B12 Transition
34. B13 Future
35. B14 Coda
36. B15 Epilogue

Running order of the main release. Pressings may split it differently.

• 8:25 Morton Subotnick: The Key to Songs (Part I)
• 18:53 Return - A Triumph Of Reason I
• 20:30 Return - A Triumph Of Reason II