The complete program of oral presentations delivered at IAU Symposium 221 is given below, including additional events outside the conference sessions. Session titles, together with their chair(s) are listed, followed by the title of each talk in the session, and its presenter. The codes referring to the different categories of talks are described at the end of the program. Abstracts for all talks can be found on the Symposium website, http://www.phys.unsw.edu.au/iau221.