What is the possibility of human interstellar migration?

The possibility is very small, so this idea is unrealistic.

Scientists and astronomers have been looking for a livable planet that is closest to the solar system and can satisfy human survival. Still live up to expectations, they found a livable planet named HD40307g in a galaxy 42 light years away from the earth. The mass of this planet is seven times that of the earth, and it is a veritable super earth.

At present, six planets have been found in the galaxy where HD40307g is located, all of which revolve around the main star HD40307, but only HD40307g is in the livable zone. Of course, there is more than one livable planet, but this one is relatively close. Let's not talk about whether humans can adapt to the gravity of other planets. It's not easy to go to that planet. The distance from the sun to the earth is only 8 minutes. How big is the solar system? The diameter is about 1 light-year.

Voyager I, launched by humans, took 40 years to walk from the earth to a small radius at the edge of the solar system, but imagine that it took 42 light years. Some scientists have suggested that it is not impossible to breed on spacecraft, but it is not only a matter of distance, but also the supply of fuel, food and air, the attraction of various planets and stars, the impact of comets, and the need to cross the terrible Kuiper Belt. Various crises have limited mankind.

The reason why humans want interstellar migration:

The home on which we live-the earth will not be an eternal existence. We know that a planet also has its life cycle, and the earth is no exception, but this cycle will be very long, and maybe the day of human extinction will not come. Of course, it may also come early for some external reasons. For example, meteorites, aliens, supernova explosions, black holes, or changes in the sun may all lead to the end of the earth.

We know that it is not easy for a planet to evolve a livable environment and produce life, even intelligent life. In any case mentioned above, it is possible to restore a vibrant planet to its original shape.

Take the earth as an example. At the beginning of its formation, there were super volcanoes, meteorites and toxic gases everywhere. After a long geological, atmospheric and even evolutionary process, the earth has become what it is today. Everything seems so natural today, but don't forget that human activities are worsening the ecological environment of the earth. Think about the emergence of Homo sapiens only about 200,000 to 300,000 years ago. However, with the rise of Homo sapiens, the mass extinction of living things and the adverse effects on the climate and environment, people have to doubt that some things are possible, including the end of the earth.