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Space colonization (also called space settlement, or extraterrestrial colonization) is permanent human habitation outside of Earth. Many arguments have been made for space colonization. The two most common ones, though, are: survival of human civilization and the biosphere from possible disasters (natural or man-made), and the huge resources in space for expansion of human society. However, as of right now the building of a space colony would be a hugely difficult and massively expensive project. Space settlements would have to provide for all the material needs of hundreds or thousands of humans, in an environment out in space that is very hostile to human life. They would involve technologies, such as closed-loop life support systems, that have yet to be developed in any meaningful way. They would also have to deal with the as yet unknown issue of how humans would behave and thrive in such places long-term. There have been no space colonies built so far, nor are there any governments or large-scale private organizations with a timetable for building any. However there have been many proposals, speculations and designs for space settlements that have been made, and there are a considerable number of space colonization advocates and groups. And several famous scientists, such as Freeman Dyson,[1] have come out in favor of space settlement. |
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