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If you had the technology, how much would an economically feasible, biosphere grade, sustainable habitat, environmentally acumen planet 'cost'?

Doing a project comparison, these options are used to narrow the technology and maintenance to only two outcomes:

1) The Genesis Device- http://m.startrek.com/database_article/project-genesis

2) Project Prometheus- http://www.weylandindustries.com/investor

There are other projects being considered, but these two appear to be most popular. Topics such as overall cost, return on investment, long term maintenance are optional. The original question of "how much would a good planet cost" has already been answered by the forum. Thanks.

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closed as too broad by ArtOfCode, ckersch, HDE 226868, Serban Tanasa, Mark Feb 16 '15 at 0:29

Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

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    $\begingroup$ Created from scratch, or found in fair/good condition and sold? Craigslist or open market? What currency? $\endgroup$ – Dan Smolinske Feb 15 '15 at 17:41
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    $\begingroup$ One would need a lot of guesses to answer that. $\endgroup$ – Vincent Feb 15 '15 at 17:48
  • $\begingroup$ The terraforming tag seems to imply that the planet was not pre-made. Is that the case? Was the entire planet constructed by beings, or did it form naturally? $\endgroup$ – HDE 226868 Feb 15 '15 at 18:24
  • $\begingroup$ Promising question, but needs a fair bit of fleshing out. "The technology"? What technology? Godlike tech? 2 cents. Alien series? Trillions of dollars. $\endgroup$ – Serban Tanasa Feb 15 '15 at 23:48
  • $\begingroup$ weylandindustries.com/terraforming $\endgroup$ – user3082 Feb 19 '15 at 1:11
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It Depends

How big is this planet? What is the composition of the planet?

What about the availability of other planets of similar quality?

I'm going to assume earth-like planet, both of composition, mass, etc.

Vsauce did an entertaining video on this. They reference an individual who says the earth (at current market value) is about 15.6 sextillion dollars ($ 15,809,800,000,000,000,000,000)! You will need to master the equation from Greg Laughlin (found on his blog) to determine the value of the planet in question. Greg Laughlin is an astronomer, among other things, with a PhD in Astronomy and Astrophysics.

However, supply and demand are fickle things, and if you only had 1 not earth planet to colonize, your cost for that planet would rocket up to unimaginable sums of money. (As if 15.6 sextillion wasn't unimaginable enough!) If you had a supply of 'good planets' so much that every one could have their own, then they're almost worthless, perhaps as expensive as a home.

Given our experiences with habitable planets, which is to say that they exist, there appears to be 8 confirmed ones. There are a lot of exoplanets, though, so it seems that habitable planets are rare. Supply/Demand would place them closer to the "cannot be purchased" values than "worth nothing" values.

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    $\begingroup$ For the informal record, I find this question and answer interesting, but small-minded. I, personally, find the worth of a habitable planet invaluable, of incalculable worth, as it can be an ever-lasting and ever-new human experience, on which I cannot place a value. $\endgroup$ – PipperChip Feb 15 '15 at 21:19
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    $\begingroup$ Well, the question asked about the cost, not the value. If you are starving, a piece of bread will be invaluable to you (value=unimaginably high), even if someone gives it to you for free (cost=zero). $\endgroup$ – celtschk Feb 15 '15 at 21:54