Interstellar's question is, why is a planet so close to a black hole chosen as a possible livable planet?

This is an important logic in movies. Although it is not explicitly mentioned in the movie, many people should understand it. I wonder why no one answered this question. It's a little long below:

First of all, the wormhole next to Saturn only leads to the star field near this black hole. This wormhole is set by "the future of them" and cannot be chosen by humans on earth. . .

At that time, the earth was no longer suitable for survival. Dr. Brand is solving a physical equation. After completing this equation, humans can control the gravity field and launch a large number of giant capsules into space. I didn't understand this paragraph myself. I made it up online. It's complicated, so I won't go to see it. But as mentioned later in the movie, this equation needs data that can only be observed inside the black hole, otherwise there is no solution.

So "they in the future" traveled through time and made a wormhole next to Saturn, leading to a black hole. There are 12 seemingly livable planets near the black hole, which tempts desperate human beings to explore and consider immigration. In fact, it is to lure them into the black hole.

In the process of exploring several planets near the black hole, various accidents occurred, which led Cooper to throw himself and his robot into the black hole in order to save the United States and reduce the quality of the spacecraft. The subtext of the screenwriter may be that these accidents were also manipulated by "future them". (Of course, it is also reasonable to say that entering a black hole will be shredded, but it is also reasonable to say that entering a black hole will stretch indefinitely but will not be shredded, and all information can be well preserved, so this bridge is not nonsense. )

Cooper and the robot that dropped the black hole each fell into a safe "artificial multidimensional space". In Cooper's space, he can see and influence his daughter Murphy's bedroom anytime and anywhere. . (This is the physical theory of multidimensional space and low-dimensional space, and it is quite complicated, but it is not nonsense. Ordinary audience can understand without brain tonic and physics. )。 . It was here that Cooper transmitted the data of the black hole center observed by the robot to his daughter through Morse code. The relationship between this data and the equation may be nonsense, and I'm too lazy to look up the information.

Murphy solved the equation with these data. Man controls the gravitational field. Humans leave the earth as easily as taking a bus, living in many space stations, or other colonies such as Europa and Ganymede. Mankind was saved and won the grand finale. .

About "they are in the future", Cooper and the robot have a conversation in a black hole:

Robot: Who are they? Cooper: Humans.

Robot: Humans have no ability to create such a three-dimensional space in a black hole.

Cooper: It's the human of the future. They can already control four-dimensional space or even five-dimensional space. There is still time.