ruveyn wrote:
iamnotaparakeet wrote:
We have another habitable planet in our solar system: Mars. It's not habitable in the same sense that Earth is habitable, but it has the resources to support colonization and technological civilization. We haven't gone there though, even though we could have done so since the 1970's, so if there were even another Earth like naturally habitable planet within our own solar system I would bet that we would also just waste our time and never go there either.
Let's see. No breathable atmosphere. No magnetic field, Cold. Dry. Cost of colonization beyond our current means. That is really habitable.
ruveyn
In the manner I specified, and that in which Dr. Robert Zubrin and others of the Mars Society have specified in depth, Mars is capable of habitability in that it will allow for a purely technological civilization. Sorry, but nature loving hippies won't be able to live out on the planitia for very long without their EVA gear. Still, you have the gear to live, you put sandbags on your habitat or bury it, and you have protection from radiation. You have an atmosphere from which CO2 can be extracted and permafrost and "geo"thermal wells from which water can be taken along with heat to run Faraday induction generators for power. For cold: insulation and heating. It's not beyond our current means any more than sending humans to the Moon is beyond our current means, and it costs less fuel to go to Mars too since you don't need fuel to decelerate as you do for the Moon. Both the Moon and Mars can be colonized now, but Mars would be easier, especially with agriculture since it has a nearly 24 hour day, most of the radiation is blocked by the atmosphere that Mars has and the Moon doesn't, and only for certain times of the year and at certain latitudes would artificial lighting be necessary on Mars whereas for half of a Lunar "day" it would be required.