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Could we launch a Soletta to terraform Mars now?
Use what is abundant and build to last
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Zubrin estimates that the required mirror would mass 200,000 tons ...
http://www.users.globalnet.co.uk/~mfogg/zubrin.htm
Suppose we could get launch costs to mars high orbit down to $100,000/kg then the cost just to launch would be $20 trillion. That's about 1% of global GDP each year for 20 years.
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Of course that is if we send it from Earth and considering its made of mostly silicon.
Well its another use for the Moon
Chan eil mi aig a bheil ùidh ann an gleidheadh an status quo; Tha mi airson cur às e.
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The conventional proposal is Aluminized Mylar at 4 g/m^2.
Of course if you had that sort of budget it would be better used establishing a space manufacturing infrastructure then using the last couple of hundred billion to build the mirror.
I wrote a bit about microterraforming here ...
http://www.newmars.com/forums/viewtopic.php?t=5499
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How about we just send the rolls of mylar to both moons of Mars.
Then we build the mirror structures on each moon from resources on each moon.
Then just cover them in mylar.
The gravity on each moon is low enough for us to build gigantic mirrors, with the added benefit of being able to point them in any direction and service them easily.
With mirror structures on the moons we loose the drift and fuel need problems they would have in free space.
Science facts are only as good as knowledge.
Knowledge is only as good as the facts.
New knowledge is only as good as the ones that don't respect the first two.
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