From: mikkelhaaheim@gmail.com
Le mardi 1 novembre 2016 10:53:06 UTC+1, Aleksandar Kuktin a écrit :
> On Sun, 30 Oct 2016 09:59:46 -0700, Mikkel Haaheim wrote:
>
> > Le dimanche 30 octobre 2016 08:45:06 UTC+1, Thomas Koenig a écrit :
> >> 0something0 schrieb:
> >>
> >> > And with enough Delta-V, we could direct a large-enough asteroid into
> >> > say... Eastern US, Far East, Western Russia, or Western Europe.
> >>
> >> What for? Nuclear weapons exist for any given level of destruction on
> >> Earth. They can also be "fine-tuned" better than a single asteroid.
> >
> > Well, three reasons I can think of off the bat:
> > It would not require messing around with deadly radiogenic material that
> > could kill you if you don't handle it properly.
> > It does not require the mining and processing of such, comparatively
> > rare, material.
> > It would only require rather simple propulsion physics knowledge, as
> > opposed to rather more complicated nuclear physics knowledge required to
> > build a working warhead.
>
> Err.. I'm not so sure about that. Moving asteroids around requires large
> amounts of energy, and very special propulsion systems. You'll probably
> have to use nuclear-based rockets to do it, and very very big ones at
> that.
Depends upon the size of the asteroid, and how quickly you want to move it.
Large amounts of energy is readily available from the sun... you just need
LARGE collectors, which are not difficult to erect in space. From there, you
have a choice of drive systems, all based on concepts most of us learn in HS
science courses: solar
sail, solar thermal (large mirrors concentrate solar energy to melt/vapourise
the asteroidal rock itself), solar electric ion propulsion, solar
electrothermal propulsion (VASIMR), solar electric EM mass drivers (using
asteroidal mass as propellant), etc.
--- SoupGate-Win32 v1.05
* Origin: you cannot sedate... all the things you hate (1:229/2)
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