[ExI] Millions of tons to space

Dan dan_ust at yahoo.com
Wed Apr 6 18:00:12 UTC 2011

Given the likehood of Uranus and Neptune having rocky metal cores about an Earth 
mass or so, this still means most of the rock and metal in the solar system is 
off Earth, no? Of course, it'd be really hard to access much of it, but the same 
applies to the rock and metal not in Earth's crust. (And, once you're off world, 
it seems like the rock and metal available on Luna and smaller bodies would be 
far more accessible and useable than the stuff packed into the Earth or any 
terrestrial planet.)

I just don't see, at this time, such a shortage of these materials, that the 
only possible attitude to take is Earth must be gobbled up for resource 


From: Eugen Leitl <eugen at leitl.org>
To: extropy-chat at lists.extropy.org
Sent: Wed, April 6, 2011 11:30:09 AM
Subject: Re: [ExI] Millions of tons to space

On Wed, Apr 06, 2011 at 07:52:34AM -0700, Dan wrote:
> You speak as if Earth contained most of the rock and metal in the solar system 

> if not the galaxy. There's plenty of rock and metal around to play with.

Most of the metals in the solar system are locked in the inner
planets. There are 4 MT/s of flux to work with, and more if you
use fusables for fuel.

Eugen* Leitl <a href="http://leitl.org">leitl</a> http://leitl.org
ICBM: 48.07100, 11.36820 http://www.ativel.com http://postbiota.org
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