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Colonizing space | Wikipedia audio article

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This is an audio version of the Wikipedia Article:

00:02:25 1 Reasons
00:02:34 1.1 Survival of human civilization
00:05:49 1.2 Vast resources in space
00:07:32 1.3 Expansion with fewer negative consequences
00:08:13 1.4 Alleviating overpopulation and resource demand
00:08:57 1.5 Other arguments
00:10:25 2 Goals
00:12:40 3 Method
00:13:34 3.1 Materials
00:15:29 3.2 Energy
00:20:41 3.3 Life support
00:21:40 3.4 Radiation protection
00:23:40 3.5 Self-replication
00:25:01 3.6 Psychological adjustment
00:25:46 3.7 Population size
00:26:16 3.8 Money and currency
00:27:20 4 Location
00:28:14 4.1 Near-Earth space
00:29:10 4.1.1 The Moon
00:29:38 4.1.2 Lagrange points
00:29:47 4.2 Other micro-g orbits
00:30:59 4.3 The inner planets
00:32:08 4.3.1 Mercury
00:32:20 4.3.2 Venus
00:32:29 4.3.3 Mars
00:33:45 4.4 Asteroid belt
00:33:53 4.5 Moons of outer planets
00:34:01 4.5.1 Jovian moons – Europa, Callisto and Ganymede
00:35:02 4.5.2 Moons of Saturn – Titan, Enceladus, and others
00:35:12 4.6 Trans-Neptunian region
00:36:24 4.7 Outside the Solar System
00:37:48 4.7.1 Intergalactic travel
00:38:16 5 Economics
00:43:17 6 Terrestrial analogues to space colonies
00:44:05 7 History
00:46:06 8 Planetary protection
00:47:07 9 Objections
00:49:02 9.1 Physical, mental and emotional health risks to colonizers
00:50:11 10 Solutions to health risks
00:53:59 11 Involved organizations
00:55:39 12 In fiction
00:56:48 13 See also
00:59:46 14 References

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Space colonization (also called space settlement, or extraterrestrial colonization) is permanent human habitation off the planet Earth.
Many arguments have been made for and against space colonization. The two most common in favor of colonization are 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 $640 per-pound to low Earth orbit by the Falcon Heavy vehicle, expected to further decrease), a space colony would currently be a massively expensive project.
There are yet no plans for building space colonies by any large-scale organization, either government or private. However, many proposals, speculations, and designs for space settlements have been made through the years, and a considerable number of space colonization advocates and groups are active. Several famous scientists, such as Freeman Dyson, have come out in favor of space settlement.On the technological front, there is ongoing progress in making access to space cheaper (reusable launch systems could reach $10 per-pound to orbit), and in creating automated manufacturing and construction techniques.

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