The sun will swallow the earth in 5 billion years. Can the "Wandering Earth" plan save mankind?

It is possible to try. Over a long period of time in the past, we have made countless conjectures about the future of the earth. However, although they are conjectures, all conjectures are based on scientific evidence and are well-founded. of. For example, in the next 5 billion years or so, the earth will most likely expand and eventually swallow the earth due to the exhaustion of solar energy. Therefore, people have come up with many countermeasures. Some people think that humans can escape from the earth, but some people believe that even if they escape from the earth, humans will not be able to find a second earth in outer space for human habitation.

Then some people think that we may be able to expand the Earth's orbit to the periphery, that is, change the Earth's orbit and push the Earth's orbit further away from the sun. For example, pushing the earth to the current position of Mars or Jupiter. As for how far the Earth's orbit is from the sun, we will not consider this for now, because it depends on what changes or impacts it will bring to the Earth and the surrounding environment after the death of the sun, so currently we only Consider the feasibility of pushing the Earth away from its current orbit.

For this problem, we can refer to the practice of asteroid orbit deviation. For asteroids that are about to hit the earth, in order to avoid the earth being hit, there are two common approaches in countries around the world. One is Place an explosive device on the surface of the asteroid and blast it. In this way, even if the trajectory is still heading towards the earth, we don't have to worry about the earth being destroyed, because the asteroids after blasting are in the shape of fragments and are very small. Even if they fall to the earth, they will not cause much harm, because when they pass through the atmosphere, as long as they are small enough, they will vaporize directly in the earth's atmosphere.

Another method is to place injectors on the surface of the asteroid that is about to hit the earth, and forcibly change the orbit of the asteroid, so that the asteroid that is about to fall on the earth changes before it hits the earth. As long as the orbit is changed so that they do not fall to the earth, there will be no problem.