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- Xref: sparky sci.space:15929 alt.sci.planetary:324
- Newsgroups: sci.space,alt.sci.planetary
- Path: sparky!uunet!techbook!szabo
- From: szabo@techbook.com (Nick Szabo)
- Subject: Lunar "colony" reality check, part 2
- Message-ID: <BxrA4D.4vx@techbook.com>
- Organization: TECHbooks of Beaverton Oregon - Public Access Unix
- Date: Sun, 15 Nov 1992 11:48:05 GMT
- Lines: 79
-
- Lunar "colony" reality check, part 2:
-
- * The claim that solar energy will be so cheap on the moon as
- to be an advantage, is absurd. A lunar site spends a
- half-month long stretch every month out of sunlight.
- Solar cells are not economical for most uses on earth
- and would cost far more to transport on the moon. Making
- them on the moon is even more absurd, see following comments
- on industrial capabilities.
- * Lower launch costs benefit all large space operations, from
- DBS to comet mining. Lunar bases do require a much larger and
- more improbable fall in launch costs than dozens of other
- space development activities which would actually make money.
- * In addition to hydrocarbons or polymers, urea is a good
- bulk way to supply lunar operations with essential volatiles
- from earth. However, these schemes require huge ongoing launches
- from earth. They require large-scale, messy, difficult to maintain
- chemical plants designed for 1/6 g, as does the cracking of oxygen
- from lunar regolith.
- * The industrial environment on the moon is vastly inferior to that
- on earth, and to that in space where there is microgravity,
- high-grade metal regolith and abundant volatiles. The energy
- and thermal environment of the moon, as well as the lack of cheap
- volatiles, makes it an extremely poor place for chemical
- and industrial operations.
- * Just as with Shuttle, astronauts will not be able to fix most
- broken equipment. Most disabling breaks, no matter to how
- small a part, will require an entire replacement unit to be
- shipped from earth. Since the astronaut's very lives will
- depend on recycling equipment, large numbers of spares will
- have to be shipped on the first trip.
- * Redesigning equipment for 1/6 g will cost _more_ than
- redesigning it for 0 g, because the latter has been
- done for a much wider array of equipment on satellites
- & stations.
- * Unlike the intrepid Biosphereans, lunar astronauts will
- not be able to cheat and come back to civilization to
- find good medical care. In a lunabago will be found
- little more than a part-time doctor and a first-aid kit.
- * There are no "resources" on the moon that could not be
- provided at lower cost from asteroids or comets, and the
- most important materials like volatiles and high-grade
- metal regolith are available only from the planetesimals.
- * Transport costs to the moon are six orders of magnitude
- greater than transport costs to the North Slope. Not only
- Ed's toilet paper but also the recycling equipment, spares,
- and volatiles (if brought from earth) will make the cost of
- supporting astronauts at least six orders of magnitude more
- expensive than the cost of hosting a worker at the North Slope.
- It should be noted that no families have permanently relocated
- to the North Slope; even the industrial workers themselves
- commute by airplane rather than live without their families for
- years on end.
- * Submarines get to surface every month or more, and can come back to
- port for food & sex. Nobody has a "submarine colony", even though
- it would be far less expensive and more functional than a lunar
- "colony".
- * If scientific knowledge is an "economic resource", then what
- happened to NASA's planetary science budget? Why can't they
- even find money for a lunar polar orbiter, which costs many
- orders of magnitude less than even a minimal lunar base?
- Why not let scientists decide where to spend the science budget?
- (Hint: lunar base isn't even _on_ their long list of priorities).
- * Microgravity manufacturing, large platforms and other space
- industries could export $10's of billions per year to earth
- by using a large supply of cheap volatiles and high-grade metal
- regolith, available in abundance from planetesimals but absent
- on the moon. With low thrust in microgravity, the power needed
- to move this material to earth orbit is orders of magnitude less
- than needed to get useless lunar material out of the moon's gravity
- well.
-
- Our obsession with the Death Valley in front of us continues
- to blind our eyes to the fertile valleys beyond, and the space
- colonization movement remains mired in failure.
-
-
- --
- Nick Szabo szabo@techboook.com
-