CNET también está disponible en español.
Don't show this again
This photo, provided by Facebook, shows Zuckerberg and Chan at their modest wedding ceremony at Zuckerberg's home in Palo Alto, Calif.
Fewer than 100 guests were in attendance, having arrived for what they thought would be a med school graduation party for Chan, according to the Associated Press account of the event.
Click on for more non-wedding Facebook photos of the bride and groom.