| Abstract Submission Deadline | 9:00 pm EDT, Friday, 4 June 2010 |
| Late Abstract Submission Deadline | 9:00 pm EDT, Friday, 16 July 2010 |
| Regular Registration Deadline | 9:00 pm EDT, Friday, 09 July 2010 |
| Late Registration Deadline | 9:00 pm EDT, Friday, 06 August 2010 |
| Onsite Registration | 22-26 August 2010 |
| Hotel Reservation Deadline for
IAU rate | 01 August 2010 |
| IAU Travel Grant Application Deadline | 9:00 pm EDT, Monday, 22 March 2010 |
| NSF & NASA Travel Grant Application Deadline | 9:00 pm EDT, Friday, 18 June 2010 |
| Banquet Sign-up Deadline | 01 August 2010 |
| Mt Wilson Observatory (All day Friday, 27 August 2010) | Deadline 22 July 2010 |