Posted on

A simple inflatable Mars Habitat

Called “Space Nomad” the concept, conceived by Gábor Bihari at the University of Debrecen, Hungary and Thomas Herzig, CEO of Pneumocell Co., Vienna, Austria is described in paper available on Academia.edu. The elegant design takes into account the payload capacity of spacecraft of the near future and in situ resources available on Mars to arrive at a safe and feasible solution.

Artist’s rendering of a cross section of the Space Nomad habitat. This option of the settlement is made of several longitudinal inflatable tubes. The regolith ceiling protrudes to provide the proper shielding. The mirrors reflect sunlight into the structure all day. Credits: Gábor Bihari, Thomas Herzig

The main side wall is a tri-layer membrane with two gaps to provide insulation. The outer wall gap contains a vacuum and the inner one is gas-filled. The protruding ceiling provides shielding from radiation and protection from micrometeorites that impinge at high angles to the structure. The habitat is not completely closed as the design has a system for processing the Martian CO2 atmosphere, conditioning it for use by the greenhouses while producing breathable air and replenishing losses.

Artist’s illustration of the wall and roof structure of Space Nomad. Credits: Gábor Bihari, Thomas Herzig

A modified version of the habitat could be deployed at the Moon’s polar region as a preliminary step toward validation of the design before a Mars mission. Unlike the Mars settlement, this structure would have to be airtight and changes would be required to the mirror system.

Illustration of a modified circular version of Space Nomad as a proving ground for technology at the Moon’s polar region. Credits: Gábor Bihari, Thomas Herzig
Posted on

Modular habitation system for human space exploration

Diagram of modular exploration system: pressure vessel, tertiary structures, power systems, EVA, and mobility. Credits: A. Scott Howe, Phd

At the 45th International Conference on Environmental Systems, A. Scott Howe, PhD presented a paper on a novel modular system for human habitation to support planetary and space exploration. The paper addresses the design requirements including mass and volume constraints to enable a variety of missions and environments. The concept was developed as recommended by NASA’s Evolvable Mars Campaign for a compact modular system and was assumed to be launched using the Space Launch System currently in the final stages of development. Howe settled on a horizontal module as the most appropriate with a single small diameter solution for fixed-sized habitats, expandable habitats, small rover cabins and a variety of other applications for both in-space and planetary surface operations.

Posted on

Tired of messy lunar dust? Take an electron beam shower

Lunar dust caked on an astronaut’s space suit. Credits: NASA

Researchers at the University of Colorado at Bolder have discovered a promising method for cleaning lunar dust off of space suits and other surfaces likely to be contaminated on the Moon. The solution could be zapping the nasty grit with an electron beam.

Lunar dust sticks to just about everything because it acquires an electrostatic charge from the solar wind. By directing an electron beam at the surface contaminated with dust particles, an excess negative charge will build up resulting in the grains repelling each other and leaping off the surface where the beam is applied. Taking an electron beam shower may be how lunar settlers clean off before coming inside after walks on the Moon.

Posted on

Lunar Cruiser: JAXA and Toyota name their rover

JAXA/Toyota Lunar Cruiser. Credits: Toyota

In a recent press release, the Japan Aerospace Exploration Agency (JAXA) and Toyota announced that they will name their crewed pressurized rover “Lunar Cruiser”. There have been some updates since we initially covered this topic. For instance, work this year progressed on simulations modeling power and heat dissipation while driving and the use of virtual reality to determine the layout of equipment in the vehicles’ cabin. In addition there have been discussions among over 100 partners in various industries of a “future lunar surface-based society” in an effort to “…gather the knowledge, experience and technological capabilities of enterprises from across a variety of industries in their attempt to realize their dream of sustaining continuous activities on the surface of the moon…”

Hopefully “Team Japan”, as the consortium is called, will take into consideration mitigation of the risks caused by lunar dust in the design and use studies of the Lunar Cruiser, as discussed in my presentation at the Moon Society’s Lunar Development Conference. At some point we hope to see the Lunar Cruiser navigating the network of roads that will hopefully be constructed as proposed by the Space Development Network. It may look like this:

Posted on

EBIOS: toward closed-loop life support for space settlement

Artist rendering of EBIOS Experimental BIOregenerative Station. Credits: Interstellar Lab

Interstellar Lab has a mission to help build a future full of life on earth and beyond. To get started, the company plans modular villages on Earth designed as sealed facilities with environmental control and life support systems. EBIOS space-inspired communities will combine architecture, engineering, product design along with international collaboration in environmental science, agriculture, biochemistry, psychology and other disciplines. Each EBIOS will be a hospitality science center open to the public as well as scientists to facilitate awareness and needed research for self-sustaining space settlements. The company is developing methods and simulation software for integrated food production, water and waste systems to support human life in any environment.

Posted on

Lunar Farming

Layout of a potential subsurface lunar farm. Credits: International Space University and University of South Australia

A report called Lunar Agriculture, Farming for the Future was published this year by an international team of 27 students participating in the Southern Hemisphere Space Studies Program 2020 at the International Space University held at the University of South Australia. The report outlines the design of an early stage lunar farm housed in either partially or fully subsurface enclosures to mitigate risks from radiation, micrometeorite bombardment and extreme temperature swings. The settlement would be located near one of the Moon’s poles to take advantage of nearly constant exposure to sunlight and access to lunar ice.

The stated mission of the project was:

“To recommend and outline a vision for sustainable lunar agriculture that can suport the nutritional requirements of humans and allow them to thrive.”

The choice of crops were selected based on nutritional value as well as physiological and psychological needs. They included a variety of plants such as tomatoes, carrots, garden cress, sweet potatoes, soybeans, peanuts, rice, and oyster mushrooms. The team also included cloudberry cell cultures and insects (crickets) for protein on the menu.

Management of the settlement was envisioned to be governed by an international authority that would hew to the Outer Space Treaty.

Just for fun, compare this report to the article “Farming on the Moon” published 29 years ago in Volume 2 No. 3 of Space Colonization Progress available in the Vintage Section.

Posted on

Lunar regolith beneficiation: a review of the latest research

Artist impression of a moon base. Credits: ESA

In the July Issue of Planetary and Space Science there is a summary of research on beneficiation, the process used for separation of minerals from waste in lunar regolith to prepare feedstock for chemical reactions to produce oxygen. One of the most commonly studied processes is hydrogen reduction of ilmenite (FeTiO3), a mineral abundant in the lunar maria. This type of research is critical to prepare for situ resource utilization (ISRU) needed for lunar settlements.

Benefication processes use differences in physical properties (e.g., density, electromagnetic characteristics) to manipulate materials, most commonly (especially on Earth) with water to facilitate separation. This is not practical in space environments where large scale water use will be more challenging then on Earth. On the Moon, dry techniques such as magnetic or electrostatic process are better suited to this application. The authors describe the physics behind the beneficiation process for ISRU in the lunar environment and survey the research performed thus far on these methods with interesting recommendations for further studies.

Posted on

Lava tubes big enough for large space settlements on the Moon and Mars

Image of Lava tubes on the surface of Mars as photographed by ESA’s Mars Express spacecraft. Credits: ESA/DLR/FU Berlin/G Neukum / NewScientist

Space advocates have long speculated that lava tubes on the Moon or Mars would provide an ideal protective enclosure for space settlements. The benefits include protection from radiation, micrometeorite bombardment, temperature extremes…the list goes on. Now, in a study published in Earth-Science Reviews, researchers at the the Universities of Bologna and Padua have found that lava tubes on these worlds could be 100 to 1000 times larger then on Earth, because of their lower gravity and the resultant effect on volcanism. Such roomy and stable subsurface chambers would be ideal for spacious space settlements.

Image of Olympus Town, a fictional colony built inside a lava tube on Mars from the National Geographic series of the same name. Credits: Framestore / Wired
Posted on

Mass value: metric for space settlement

Image credit: Richard Bizley, bizelyart.com / National Space Society

In a paper published in New Space last March, Peter Hague describes a figure of merit he developed to drive policy decisions to help accelerate space exploration and space settlement. The aim of the paper was to generate a single metric for every potential space mission on a common scale for comparison purposes. This ‘mass value’ is the amount of mass that would need to be placed in low Earth orbit (LEO) to perform the same mission using a baseline method. That method would use only storable propellants and Hohmann transfer orbits – no gravity assists, aerocapture, high energy propellants or ISRU.

This approach puts a price on all the add-ons which expand the mission beyond the baseline. One can then use a single normalized scale to calculate how much mass to LEO you would save by making propellant on Mars for example, or by taking advantage of a certain launch window to get a gravity assist.

A hands-off government entity could subsidize space expenditures at a flat rate per kg of mass value, confident they are promoting space development without having legislators involved in engineering decisions.

Aggregating all the missions by a nation, company, or other entity could be used to calculate an analogue of GDP for a space civilization. While this does not measure everything we care about – scientific merit, human occupation, etc – neither does GDP. It does capture the overall capability to move around the solar system; and as such, is as useful for charting our journey to becoming a Type II civilization on the Kardashev Scale as it is for analyzing individual missions.

Thanks to Peter Hague for the material in this post. We’ve heard a rumor that there may be a book forthcoming on the subject. Looking forward to it!

Posted on

Student concept for a crewed lunar rover in support of Artemis

Image depicting EMPRESS. Credits: SEDS-UPRM

When the first woman and next man return to the Moon under the Artemis Program, they will need a mobile scientific platform to assist with exploration of the lunar south pole. Under the Revolutionary Aerospace System Concepts – Academic Linkage (RASC-AL) competition, a team of Students for the Exploration and Development of Space (SEDS) at the University of Puerto Rico, Mayaguez (UPRM) won 1st Place in the contest with their Exploration Multi-Purpose Rover for Expanding Surface Science (EMPRESS). The rover would land at Shackleton crater at the lunar south pole in 2023 taking samples and exploring the region in preparation for the first crewed Artemis mission in 2024.

The rover is envisioned to include two robotic arms and a suite of seven scientific instruments to characterize the lunar surface composition as well as other high priority astrophysical investigations. One the proposed instruments is a neutron spectrometer that could sense the amount of hydrogen in the regolith using data from maps compiled by the Volatiles Investigating Polar Exploration Rover (VIPER) which will survey the lunar south pole for the presence of volatiles and water ahead of the Artemis Missions. This could pave the way for ice mining operations and eventual space settlements in a cislunar water economy.

University of Puerto Rico at Mayagüez winning SEDS team of the 2020 RASC-AL Virtual Forum. Credits: RASC-AL