To attend the Joint Discussion, participants are required to register to the IAU General Assembly (GA) and pay the full registration fee for the GA. The General Assembly is intended for IAU members, but non-members are allowed to participate, after specific invitation of the International Astronomical Union. Instructions on how to obtain such an invitation will be given soon.

The Server for abstract submission will be started on November 1st, 2008, together with the registrations and applications for travel grants. The travel grant application and the abstract submission will be opened until March 1st, 2009. People interested in participating can make a pre-registration, in order to be included in the mailing list for receiving news and announcements, when available.

To register, go to

To pre-register, go to