Space colonization space settlement extraterrestrial colonization by chemical Man

Space colonization (also called space settlement, or extraterrestrial colonization) is the permanent human habitation of the planet Earth.Many arguments have been made for and against space colonization. The two most common in favor of colonization is survival of human civilization and the biosphere in the event of a planetary-scale disaster (natural or man-made), and the availability of additional resources in space that could enable expansion of human society. The most common objections to colonization include concerns that the commodification of the cosmos may be likely to enhance the interests of the already powerful, including major economic and military institutions, and to exacerbate pre-existing detrimental processes such as wars, economic inequality, and environmental degradation.

No space colonies have been built so far. Currently, the building of a space colony would present a set of huge technological and economic challenges. Space settlements would have to provide for nearly all (or 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 controlled ecological 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. Because of the present cost of sending anything from the surface of the Earth into orbit (around $2,500 per pound to orbit, expected to further decrease), a space colony would currently be a massively expensive project.
 

Colonization targets

Colonization of the Moon
Colonization of Mars
Colonization of Venus
Colonization of Mercury
Colonization of the asteroids
Colonization of Ceres
Colonization of the outer Solar System
Colonization of Europa
Colonization of Titan
Colonization of trans-Neptunian objects
Terraforming targets

Terraforming of Mars
Terraforming of Venus
Organizations

Mars Society
National Space Society
The Planetary Society