Tuesday, June 24, 2014

Pioneering and Commercial Advantages of Permanent Outpost on the Moon and Mars

Twin Regolith shielded habitats on a sintered  lunar surface area. Each habitat module is connected to each other by an inflatable pressurized  walkway. 
Permanent outposts on the surfaces of the Moon and Mars  could be the first major steps towards the expansion of human civilization into the rest  of the solar system.  Unaided traction for human walking requires a gravity that is at least 10% of the gravity at the  Earth's surface. The Moon, Mars, Mercury, and the Jovian moon, Callisto, are all worlds that have surface gravities higher than 0.1 g. So these are extraterrestrial worlds  that will probably be accessible for continuous human occupation before the end of the century. However, whether such  low gravity environments would  have significant deleterious effects on  human health and reproduction is currently unknown. But long before the permanent settlement of extraterrestrial worlds,  human outpost on the Moon and Mars, could have beneficial scientific, commercial, and even strategic benefits for those nations and businesses that dare to venture there.

Planets and Moons within the solar system that are potentially suitable for human colonization:

Moon

surface area relative to the Earth: 7.4%     

surface gravity relative to the Earth: 0.17g 

diameter relative to the Earth: 27.3%


Mars

surface area relative to the Earth: 28.4%
   
surface gravity relative to the Earth: 0.38g 

diameter relative to the Earth: 53.1%


Mercury
 
surface area relative to the Earth:  14.7%
   
surface gravity relative to the Earth: 0.38g 

diameter relative to the Earth:  38.3%


Callisto 

surface area relative to the Earth:  14.3%
   
surface gravity relative to the Earth: 0.13g 

 diameter relative to the Earth:  37.8%

Note: Land area comprises 29% of the Earth's surface with 71% covered by water

Regolith shielded habitat designed for the Moon and Mars. Mobile water tanker provides water to the habitat for drinking, washing, growing food, and for the production of air.
Internal view of a regolith shielded habitat with regolith placed within the two meter cavity within the automatically deployed walls surrounding  the 8.4 meter in diameter pressurized habitat.

Permanent outpost on the surface of the Moon could immediately exploit lunar regolith to protect humans from significant exposure to harmful levels of radiation.  Just two meters of lunar regolith dumped within the walls of a lunar regolith habitat could reduce annual cosmic radiation exposure below the maximum legal limit for radiation workers on Earth (5 Rem per year)  during the solar minimum while also protecting astronauts from radiation exposure from major solar events. Protection from micrometeorites and extreme temperature fluctuations would be an added benefit of  insulating a lunar habitat with regolith.

A single lunar habitat derived from the technology used to make the light weight 8.4 meter in diameter hydrogen fuel tanks for the SLS could provide two levels of floor space  approximately 111 square meters in area. That would be more floor space than the average home in Germany, Japan, Sweden, Italy, Spain, Russia, and in the UK. The deployment of such  habitats for the private commercial community could also be used  as lunar hotels for space tourist or to house workers for private companies involved in the export of lunar water or regolith for government and private entities.

Creating solid pavement for the deployment of  habitats and other lunar outpost components upon dust free surfaces could be created by using mobile robots to pave and sinter lunar regolith.  This could eliminate tracking in deleterious lunar dust into pressurized habitats when astronauts are working in the paved  lunar outpost area. 

Mobile water tanker for storing and transporting water and a mobile water extracting  robot that uses microwaves to extract water from regolith from the shadowed areas of the lunar poles.
In the lunar polar regions, roving microwave water extraction robots could mine ice particles from the  permanently shadowed areas for the production of water. Water, of course, can be used for drinking, washing, food preparation, and for growing food. Water can also be electrolyzed for the production of oxygen for air and for the production of hydrogen and oxygen for rocket fuel needed to return to Earth.

Human biowaste could be converted into methanol through pyrolysis. Methanol and oxygen can be used with fuel cells to produce electricity for back up energy during periods of lunar darkness. The water produced from the combustion of methanol and oxygen can be recycled. The CO2 produced from the manufacture of methanol and from the combustion of methanol in fuel cells can be used to enhance the growth of indoor lunar crops. Small portable methanol fuel cells could also be used to provide power for pressure suits during lunar excursions.

Nitrogenous biowaste, such as urine, could be used as fertilizer for lunar crops.

However,  there is some  evidence that substantial quantities of carbon and nitrogenous material may also  be a significant component of the permanently shadowed areas at the lunar poles. Astronauts stationed at  lunar outpost at the lunar poles could used to explore and to quantify the amount of volatiles located within the shadowed regions.

Buried nuclear power plant on the lunar surface (Credit: NASA)
While solar panels attached to the habitats would provide the initial power for a lunar habitat, small nuclear reactors   buried beneath the lunar regolith only a few hundred meters away could provide substantial amounts of electricity for the lunar facility, 24 hours a day.

Outposts originally designed for the lunar surface could also be utilized  on the surfaces of Mars, Mercury, and Callisto and even on the meager surfaces of large asteroids and on the moons of Mars.
Three regolith shielded habitat modules on a sintered  Martian surface area. Each habitat module is  connected to each other by two inflatable pressurized  walkways.   


Permanent outpost on the Moon and Mars and on other worlds, would allow the continuous exploration of those surfaces by both humans and robots. Unmanned solar or nuclear powered rovers on the lunar surface, operated by humans on Earth, could visit and collect samples from  practically every area on the surface of the Moon. The collected rocks and soil could then be returned to the lunar outpost for immediate study or for eventual export back to Earth.

On Mars, both robotic rovers and hydrogen blimps could be utilized to continuously explore the Martian surface. Such robots could be operated in real time by the astronauts on the Martian surface or in orbit around Mars at a  space station.  Again, the collected samples by the remote controlled robots could be returned to the Martian outpost for immediate study or for eventual export back to Earth.

A permanent US government presences on the surface of the Moon and Mars will also enhance the ability of private American companies to protect their assets from potentially hostile foreign entities that will probably also be on these new worlds by mid century.

Marcel F. Williams

© New Papyrus


Links and References

 D. Bryant Cramer.  "Physiological Considerations of Artificial Gravity."  Applications of Tethers in Space, volume 1, pages 3·95-3·107.  Edited by Alfred C. Cron.  NASA Scientific and Technical Information Branch, 1985.  Conference Publication 2364: proceedings of a workshop held in Williamsburg, Virginia, June 15-17, 1983.

Lunar Station Protection: Lunar Regolith Shielding

Wet vs Dry Moon

Utilizing the SLS to Build a Cis-Lunar Highway

Cosmic Radiation and the New Frontier

NASA Steps Closer to Nuclear Power for Moon Base

How big is a house? Average house size by country
 
Mission and Implementation of an Affordable Lunar Return (Spudis & Lavoie) 

Using the resources of the Moon to create a permanent, cislunar space faring system (Spudis & Lavoie)



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Destination Moon

glennwsmith said... Very nice, Marcel. This is one of the most beautifully put together, forward-looking, and yet also understated videos which I've yet seen from a major space agency -- and it just goes to show that there's a lot of good material out there if you know where to find it.

Regards,
G. W. (Glenn) Smith

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