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by aymblym
Sat Jun 29, 2013 2:55 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1231: "Habitable Zone"
Replies: 51
Views: 14077

Re: 1231: "Habitable Zone"

Another advantage of the spherical mirror. Yes, I didn't see your post; it would definitely be the way to go. One reason would be that when you start plugging numbers into the Drake Equation, you realise that, for extraterrestrial life not to exist, you need the probability of life arising on a hab...
by aymblym
Fri Jun 28, 2013 10:29 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1231: "Habitable Zone"
Replies: 51
Views: 14077

Re: 1231: "Habitable Zone"

I'm surprised no one mentioned that the mirror would have to be half the diameter of Earth, otherwise the edges of the reflection would be cut off... Even a 1 nm-thick aluminum foil would weigh 340000 tons. This would require 100 years to produce, at current production capacity. Assuming very optimi...

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