Two and a half hours after launch, the third stage engine was reignited for 350 seconds to send them on the way to the moon.
At three hours into the mission, the Command Service Module (nicknamed Kitty Hawk) separated from the third stage and attempted to dock with the Lunar Module (nicknamed Antares) For some reason, the two spacecraft would not dock and it took six attempts before the docking was completed. If it had not been possible to dock, the landing mission would have been canceled.