If human beings are expected to migrate to other planets, what are the difficulties they face?

The first is how to get to the planet, which is also the most critical premise. From the current space exploration technology and aviation technology, there is an irreconcilable contradiction, that is, the livable planet is getting farther and farther away from us, and the speed of spacecraft is difficult to reach. Why is the livable planet getting farther and farther away? We all know that the necessities of human existence are air, water, energy, temperature and so on. These core necessities are the key to human survival, and they are also the criteria for judging the migratable planet. Without these substances, these planets are not suitable for survival. With the development of our deep space exploration technology, we found that there is no such planet in the solar system. Even if we explore further, there is no such planet. This indirectly tells us that the migratable planet is far away from us. The contradiction is that human space technology is stretched. In front of the distance of light years, the speed of human flying thousands of kilometers per hour is simply? Too slow? Yes So the biggest difficulty is that you can't fly if you find it.

The second is how to survive for a long time. At present, there is no planet that can be directly migrated like the earth, so can we transform our neighbor planets? In recent years, the moon, Mars and so on are the target planets for human beings to go into space. According to the current technology, transforming the planet is only theoretically feasible. We can solve the problems of oxygen, water and other living substances, but how to form an ecology suitable for life on it is a difficult problem. It can't be said that all living materials have to be transported from the earth, which is obviously not immigration.

Finally, human adaptability. We all know that the earth civilization is the only civilization known to mankind, and the environment of the earth is also unique. Humans have evolved on this planet for millions of years, and it is impossible to know what will happen to their bodies if they move to outer space. What happens to our genes in space radiation is related to survival and reproduction. So it is not easy for human beings to adapt to other planets.