If Venus and Mars must be chosen, which is more suitable for human migration?

First of all, Mars, like the Earth, and Venus are also located in the livable area of the solar system. Livable area refers to the position of our planet and the sun. You can't be too close or too far away, otherwise the surface temperature of the planet will be very hot or very cold, and the mass and size of Venus are very similar to that of the Earth. It also has the same gravity as the earth. If humans immigrate to Venus, at least the gravity of the earth will not change much.

However, the surface temperature of Venus is very high, because the whole Venus is wrapped in a thick atmosphere, and the main component of the atmosphere is carbon dioxide, which will cause the greenhouse effect of Venus, making the temperature of Venus very high and the atmosphere very thick. It will increase the air pressure on the surface of the golden planet. Compared with the atmospheric pressure on the earth, Venus is more than 100 times larger than the earth, and there are no water molecules in the atmosphere of Venus, which also causes the harsh environment of Venus.

Mars is also a livable area in the solar system, similar to the earth. Of course, the basic conditions of Venus will be worse, but Mars has conditions that Venus does not have, that is, there is water on Mars. According to the detection and analysis of Mars probe, there are a large number of glaciers at the two poles of Mars, and according to the analysis, there may be liquid water under Mars, with very large reserves. We should know that water is essential for human beings. As long as there is water, there is the ability to breed life. Oxygen and food can be obtained from water sources.

The variation of day and night on Mars is about 24 hours. The environment of Mars is much better than that of Venus, and there is no terrible high temperature. On the contrary, it's cold. This is because the atmosphere on Mars is so thin that it is impossible to preserve the heat of the whole Mars. This also forms the temperature at which Mars will get very hot in the sun, which is 70 degrees Fahrenheit. Once there is no sun, the temperature of Mars will drop to over 60 degrees Fahrenheit, and the temperature at the poles of Mars will drop to Fahrenheit. Comparatively speaking, Mars is more suitable.