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Can humans build a space station in the near future and prepare to emigrate to another planet?

It is impossible to build a space station in recent years ~ the current technology cannot carry out a large-scale self-powered space station, and now it is only an earth space station. First of all, one of the problems to be solved in building a space station is the galaxy-planet problem. The scale and technological level of the space station determine the scale of the space station. At present, the level of human beings can't send human beings out of the earth-moon system ~ let alone others!

It takes at least 50 years to prepare for the appearance of immigrants! ~