To some extent astronauts already live in space, even if for just a few months.
People can’t live in space for too long because the lack of gravity affects the body in weird ways. Maybe in the future the technology will allow people to live in space.
The big question is whether we could have a self-sustaining colony off earth. Could we make the supplies we needed, especially food, water and air? This is easier on a planet or moon than in space. We’re going to have to have a base on the moon or an asteroid, then use that for future space missions, unless we find a much less expensive way to get on and off earth.
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