[extropy-chat] Space elevator numbers III

[spike]

I have been away on a business trip, caught in that bad storm in the
northeast, oy.  

More later on this, but the issue with a lunar synchronous cable is related
to the moon having a tragically slow rotation rate.  The earth is in lunar
synchronous orbit, if you want to think of it that way.  If you calculate
the length of the cable to either lagrangian points 1 or 2, the cable needs
to be crazy long.  Technically it is easier than an earth synchronous cable,
but it doesn't have much use methinks.

spike

PS I spent way too much of my spare time on this trip trying to figure out
why Kieth's idea of uranium solution transmutation wouldn't work.  I have a
sick feeling in my gut that it would work.  Which means any sophisticated
chemist could make purified plutonium in her basement lab using readily
available materials, oy freaking vey.





> -----Original Message-----
> From: extropy-chat-bounces at lists.extropy.org [mailto:extropy-chat-
> bounces at lists.extropy.org] On Behalf Of Eugen Leitl
> Sent: Thursday, February 15, 2007 8:10 AM
> To: extropy-chat at lists.extropy.org
> Subject: Re: [extropy-chat] Space elevator numbers III
> 
> On Thu, Feb 15, 2007 at 10:23:10AM -0500, Keith Henson wrote:
> 
> > Sigh.  You need to dig into Tom Heppenheimer's 30+ year old technical
> work
> 
> I was hoping for a resident orbit mechanic, or at least someone
> who could fire off a Matlab or Mathematica one-liner in
> a half a minute.
> 
> > on achromatic orbits.  What are you going to launch and where are you
> going
> 
> I'm trying to launch 1-100 kg sized packets, preferrably in a
> rapid-firing sequence somewhere from the lunar north pole just fast
> enough to reach escape velocity and then be captured by Earth.
> It might or might not require an aerobraking corridor for capture
> and/or orbit circularization. This should work, but I'd rather
> not do the math.
> 
> > to launch it too?  And how are you going to collect it?
> 
> Not collect, this is supposed to unfold into um-thin PV
> platforms somewhere in Earth orbit, which do realtime
> phased array beamforming, tracking rectenna ground stations.
> There should be several such platforms in line of sight
> in order that the target illumination is semi-steady.
> 
> > http://en.wikipedia.org/wiki/T._A._Heppenheimer
> > >
> > >Power alone is not alone a motivator, since this leaves you
> > >with a teleoperated industry basis which can grow exponentially.
> >
> > To do what?
> 
> To disassemble parts of the Moon and the planetoids into an
> optically dense circumsolar computational node cloud, as
> habitats for a solid-state civilization.
> 
> --
> Eugen* Leitl <a href="http://leitl.org">leitl</a> http://leitl.org
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