[extropy-chat] Space elevator numbers III

giorgio gaviraghi giogavir at yahoo.it
Fri Feb 16 14:11:54 UTC 2007

If robotics systems are still unavailable and sophidticated enough we wil need a manned mision but that means higher costs and payloads
Still is much less expensive to reach a NEO than the Moon, being a gravity well
We have all what we need at reachable lenght, we only need to grab it forgetting, fo the time bieng,me being, the Moon and Mras , both gravity wells and science fiction myths.
we can reach them later with an affordable possibility to come back and to develop a space economy but we must first build a space transportation system with in situ materials

----- Messaggio originale -----
Da: Eugen Leitl <eugen at leitl.org>
A: extropy-chat at lists.extropy.org
Inviato: Venerdì 16 febbraio 2007, 14:51:41
Oggetto: Re: [extropy-chat] Space elevator numbers III

On Fri, Feb 16, 2007 at 12:13:40PM +0000, giorgio gaviraghi wrote:

> So what it means all the above?
> it means that we could develop the same capability , changing our startegy from the current earth-based  to a new space based approach.

> That can be done in the following phases:
> Phase 1-Rendez vous with a small ( 100 m ) water rich NEO asteroid
>  mine it and utilize its minerals to manufacture , automatically, an exostructure of adequate size

Excellent idea, but for a couple of serious issues.
The velocity delta for all the known planetoids is high.
Microgravity work is different from gravity work.
The distance is too long for teleoperation by closed
loop motorics (already with the Moon one has to train
operators for the delay, and augment them with system-side

There is no reason not to use the Moon (we're not as lucky
as Mars with Phobos and Deimos), and to not send astronauts.
I can teleoperate a platform via the Internet much more
efficiently than a zero-volume-delta life support system.
Even on-site, it would be much more efficient to keep
people in the pressurized cabin while the teleoperated
robots roam the lunar landscape.

Long-term, people have to future in deep space.

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