home *** CD-ROM | disk | FTP | other *** search
- Xref: sparky sci.space:15518 alt.sci.planetary:248
- Newsgroups: sci.space,alt.sci.planetary
- Path: sparky!uunet!think.com!sdd.hp.com!zaphod.mps.ohio-state.edu!menudo.uh.edu!judy.uh.edu!st17a
- From: wingo%cspara.decnet@Fedex.Msfc.Nasa.Gov
- Subject: Re: Lunar "colony" reality check
- Message-ID: <8NOV199215122237@judy.uh.edu>
- News-Software: VAX/VMS VNEWS 1.41
- Sender: st17a@judy.uh.edu (University Space Society)
- Nntp-Posting-Host: judy.uh.edu
- Organization: University of Houston
- References: <BxEt07.G32@techbook.com>
- Date: Sun, 8 Nov 1992 21:12:00 GMT
- Lines: 133
-
- In article <BxEt07.G32@techbook.com>, szabo@techbook.com (Nick Szabo) writes...
- >Lunar "colony" reality check:
- >
-
- Nick, Nick, Nick, at it again I see.
-
- >* The moon has no significant sources of hydrogen, nitrogen,
- > or carbon. Wishful thinking about polar volatiles or
- > scrounging solar wind particles are hardly significant.
-
- Until there is a lunar polar orbiting spacecraft with a neutron spectrometer
- this question will remain unanswered, not wishful thinking. Calculations
- that you can do Nick old boy shows that the temperature in some of the
- northern and southern lunar craters is low enough that water could exist there
- for several billion years. If you doubt this look at the voyager pictures. Some
- of the permanently dark craters have temps well below that of the surface of
- the Jovian and Saturn moons. Comments like yours above merely reflects your
- bias and not the state of knowledge in this area. Also underground water and
- volatiles are a definite possiblity. What about carbonaceous meteor impact
- areas? Would this not enrich the surrounding area and the underground where
- the meteor penetrated with voliatiles or even water in the case of a comet?
-
- >* A livable atmosphere is mostly nitrogen, not oxygen.
- >* Plants and animals need copious amounts of hydrogen, nitrogen,
- > and carbon.
- >* There is no affordable way to crack oxygen out of lunar
- > rock or to recycle it. This would cost, at bare minimum,
- > tens of millions of dollars per astronaut per year.
-
- Apparanently you have missed the last few lunar resource conferences. The
- carbotek process which is ALREADY producing oxygen from lunar simulants is
- a viable and relatively low cost process for making oxygen out of native
- materials. By the way the Shimzu corporation is paying for that research. I
- guess the Japanese see no promise?
-
- >* Because of transportation costs for recycling equipment,
- > recycling on the moon is far more expensive than recycling on
- > earth. Even on earth the best attempt at building a livable,
- > working biosphere masses hundreds of thousands of tons and leaks
- > over tens of tons of air per year.
-
- References for this statement?
-
- >* Hydrogen is extremely innefficient to transport from
- > earth. The stoichiometric volume of LH to make water is
- > _larger_ than the volume of oxygen; huge amounts will
- > be wasted on tankage. Much of the LH will leak before
- > it can be used; it's extremely difficult and expensive
- > to store even for the few days trip.
-
- Funny that the Apollo SIII stage had no problem with that. It worked for
- several days at a time to push the astronauts to the moon. Here is another
- idea for you Nick. Refigure this if you ship WATER. Well you solve both
- problems. You get inexpensive transport (you don't need 100% rocket reliablity)
- and you get a power source by the stepwise conversion of excess water to H & O
- during the lunar day and back again for power generation during the lunar night.
- Nick please open your mind a little.
-
- >* The annual per capita consumption of water in the
- > U.S. is over 500 tons. In this as in many other
- > areas, the "colony" will be living in abject
- > poverty despite the $billions spent on its
- > construction.
-
- This is because we americans love to take a bath every day.
-
- >* It takes more than a rocket payload full of hydrogen
- > to make the water needed by industry. If we're to have any
- > significant manufacturing industry in space, we're going to need
- > tons of volatiles. For example, here is the water used to make
- > a few kinds of products on earth:
- >
- > gallons/unit
- > ------------
- >finished steel, ton 40,000
-
- These are nice true numbers but are not applicable to space. most of the
- water you quote here is used in the reduction process that gets the iron from
- the ore. In space this is eliminated by using pure sources from Nickel iron
- meteors and simply melting by electrical induction.
-
- >automobiles, unit 12,000
-
- I dont think we will make many cars up there or buses for that matter.
-
- >trucks, buses, unit 20,000
- >ref: Mark's Standard Handbook for Mechanical Engineers, 1987
- >
- >* There is no signficant economic resource on the moon.
- > Revenues as a percentage of costs will be 0%.
-
- Hey! Have you been there? Geez there has not been even one resource mapping
- mission to the moon and you are prepared to live or die by this statement?
- Come on, that sounds like the people on the Spanish court who were against
- Columbus. You have absolutly zero basis for that statement. Just from the
- Apollo 15 and 16 gamma ray spectrometers we found economically feasible
- concentrations of titanium and aluminum. This was only a few days of
- survery with a crude instrument!
-
- >* SSF bare-bones habitat operations costs will be $2 billion
- > per year. Scaling for transport costs gives over $10 billion
- > per year for a bare-bones lunar "base". Redesign will cost
- > even more than SSF cost, since industry has no reason to
- > participate beyond the usual NASA-contractor mode.
- >* Calling a few astronauts huddled in a Winnebago a "base" is
- > a major exaggeration. Calling it a "colony" is an abominable
- > misuse of the word.
- >
-
- Calling this post a reality check is also abominable. You don't have to go
- you do not have to particpate. Just get the heck outta our way.
-
- >There are dozens of other pathways to space colonization.
- >Fixation on obsolete concepts like the "lunar base" and oxymoronic
- >concepts like the "lunar colony" is one of the main reasons why
- >the space colonization movement lies mired in failure.
- >
- >
-
- Tell you what Nick. You do it your way and we will do it this way and lets
- see who comes out ahead.
-
-
- >--
- >Nick Szabo szabo@techboook.com
- >Hold Your Nose: vote Republocrat //////// Breathe Free: vote Libertarian
-
- Hell with all of em be an American and do something with your life and do not
- count on any politician.
-
-
- Dennis, University of Alabama in Huntsville
-
-