Which planet are human immigrants most likely to go to?

Mars, geological structures and structures in the air are the closest to the earth, except for the bad temperature.

There is a large amount of liquid methane on Mars, which can be used as a simple energy source for Mars base, and sulfide in gas can be used as an important basic material for Mars base construction. Generally speaking, Mars is the most suitable planet to consider in terms of energy, materials and living environment.