1.stay At first, Matthew entered the five-dimensional space and thought that the professor had deceived himself and hoped that his daughter would keep herself at that time. 2. NASA coordinates: Matthew received the news from the robot Tass and learned the data of the black hole singularity, so he sent out NASA coordinates (also the beginning of the film), because only through interstellar can he and Tass know the data of the black hole singularity. 3. Black hole singularity binary star: Finally, the man told this important information to his daughter through the second hand of his watch.