What technologies are likely not to be realized at present?

From scratch, it is a miracle that human beings have come to this day, creating the present scientific and technological civilization, and moving from bold imagination to reality step by step through practice, but human beings are not gods after all, and some processes are insurmountable.

Some time ago, there was a movie, Wandering the Earth. I don't know if you saw it. The operation inside is very sci-fi. This is an imagination with a wide brain. It is actually impossible to install a booster for the earth through the energy on the earth and escape from the solar system.

1. First of all, as a plan to escape from the solar system, since we have decided to escape from the solar system by using gravitational slingshot effect, why didn't we consider all possible situations in advance, such as tidal effect, and the wandering caused by the magnetic interference of other celestial bodies as we get closer and closer?

2. Install steering gear at the equator to stop the rotation of the earth, which directly leads to the death of half the world's population. Moreover, the direction away from the sun after stopping is always night, and people who deviate from that area can't survive at all (the surface temperature is extremely low and there is no underground city). From a humanitarian point of view, it is unacceptable to declare these people dead directly.

3. The problem of resources. Humans have lived underground for about 2500 years, and resources are seriously scarce. What if you have a DNA profile? Maybe there are not many people when Centauri arrives.

4. With the impact of Jupiter's storm on the earth, I wonder if the earth with a momentum of Mach 65,438+0,000 can remain undivided and deformed. I really admire the earth. Maybe the rigidity of the earth is too high to be torn by the gravity of a black hole!

Simply put, feasibility: the price is too high! It is said in the movie that pushing the earth out of the solar system will consume energy. If you use those planetary engines, the light will accelerate to 2000, and you will be wandering! Secondly, if humans have mastered controlled nuclear fusion technology and can apply it on a large scale, there is no need to escape from the solar system.