From: Damien Broderick (damien@ariel.ucs.unimelb.edu.au)
Date: Thu Jan 01 1998 - 07:30:55 MST
[after bouncing twice from extropians@extropy.com here's another try -
sorry if it doubles up]
At 11:05 PM 12/29/97 -0800, JKC wrote:
> >Mining asteroids will, IMO, completely eliminate Earth mining.
>
>
>I may be a wimp but the idea of using the Earth's atmosphere as a brake to
>slow down a large irregularly shaped asteroid to change its orbit, as some
>have suggested, scares the hell out of me. I think there will always be a
lot
>of opposition to crashing any asteroid larger than a small bus to the Earth,
>and if they were that small I wonder if it would be economic.
The sensible versions I've read use solar mirrors to melt asteroid metals
in situ, then railgun standardised ingots to a relay station at one of the
earth-moon libration points, for redirection to earth (after, perhaps,
reshaping into lifting bodies). Still pretty scary.
Damien Broderick
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