If humans want to leave the earth, which planet are they most likely to move to?

Sustained population growth, shortage of resources, environmental pollution and changes in the natural environment are all reasons why human beings have to leave the earth partially. Obviously, an earth is not enough to support the rapid progress of human civilization, so scientists have long been looking for livable planets outside the earth. Although humans can only watch from the earth, it is always good to plan ahead. After all, the development of science is not achieved overnight, but accumulated bit by bit.

If human beings want to leave the earth in part or in whole, which planet is most likely to move to first?

Because it is very likely that a spacecraft with interplanetary navigation capability will not be developed in the short term, the first planet to move in is probably the planet inside the solar system. In the inner solar system, there are four rocky planets, in addition to some larger satellites, such as Europa, Europa and Europa. Enceladus and Saturn, these satellites are no less than the moon and the earth's satellites.

Since there are so many planets with solid surfaces in the solar system, I don't believe that none of them can be slightly modified and unfit for human habitation?

The first thing people think of is Mars. Its volume is only 1/7 of that of the earth, and its mass is 1/9 of that of the earth. On Mars, there is only a thin atmosphere, 2/5 of the earth's gravity, a very small amount of oxygen and liquid water without surface flow. It can be said that from any point of view, Mars is not suitable for human habitation.

Is it easy to transform Mars?

We often see some ideal concepts about transforming the earth. In fact, scientists have not really started to study planetary engineering until now. It is unthinkable to transform the ecological environment of a planet with manpower, material resources and financial resources, and it must have enough time. This is not a task that can be completed in hundreds of years.

It can be said rudely that ideas, conceptual theories and science fiction are still at the forefront in the field of transforming the planetary environment. However, it is undeniable that Mars still has great livability. The latest research found that if all the ice sheets in the polar regions of Mars can be melted, the obtained liquid water can cover the depth of 1.5 meters on the surface of Mars, and the rest is to transform the atmosphere and add a magnetic field to Mars, but these are very difficult, and some ideas are just ideas.

The surface of Venus is obviously not suitable for transformation, but some scientists believe that a space city can be built in the atmosphere of Venus. At the height of 50-60 kilometers on the surface of Venus, its temperature and pressure are very close to the lower atmosphere of the earth. Scientists imagine that a hovercraft, Cloud City, can be built to float in the upper atmosphere of Venus.

There are a large number of satellites, such as MUJI and Tuji, some of which are over 3,000-4,000 kilometers in diameter. In the future, humans may be able to build a base on it or close the city.