Lunarpedia - User contributions [en]

Titanium Dioxide

2023-05-13T18:39:11Z

Strangelv: Strangelv moved page Titanium dioxide to Titanium Dioxide: Capitalization

{{chem Stub}}

TiO2 , or ''titania''. is one of the products of the [[Ilmenite Reduction|hydrogen reduction of ilmenite]]. Titanium dioxide occurs naturally in the form of three minerals: anatase, brookite, and [[rutile]].

Titanium dioxide is a transparent, refractory material. It is used as a white pigment in paint. Because of its high index of refraction, thin films of titania are sometimes used as an antireflection coating (AR coating) on solar cells.
 

[[Category:Chemistry]]

Titanium dioxide

2023-05-13T18:39:11Z

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#REDIRECT [[Titanium Dioxide]]

Recycling Rocket Exhaust Presented at Mare Cognitum Chapter Meeting

2023-05-13T17:34:20Z

Strangelv: Strangelv moved page Recycling Rocket Exhaust presented at Mare Cognitum chapter meeting to Recycling Rocket Exhaust Presented at Mare Cognitum Chapter Meeting: Capitalization

At the Zoom meeting of the Mare Cognitum chapter of the Moon Society on the 16th of June, 2022, a speaker gave a talk roughly reproduced below:

I will explain potential advantages of recycling rocket exhaust into rocket propellant on the moon. Then I will suggest likely difficulties in that recycling. Then I will offer possible means of addressing those difficulties.

The propellant on the moon from recycling rocket exhaust will be worth money. Just how much is difficult to figure exactly. The cost of the Apollo program divided by the number of pounds that reached the moon yields about $2.8 million per pound which includes the cost of shipping it all to the moon. So, the cost of shipping to the moon must be less than $2.8 million per pound.

Starting with the cost of a recent Israeli moon mission I figure that the cost must be less than $300 thousand per pound. Working from an estimated cost of at least $6,000 per pound for achieving direct lunar transfer orbit, without the cost of developing a payload, I get at least $13 thousand per pound shipped to the moon. So, the cost of recycling rocket exhaust into propellant should be less than that to make it worthwhile. How much less is a good question. If the cost of recycled fuel can be made low enough it could make transportation from the moon for materials for building space based solar power (SBSP) stations practical. That is the really big draw. Once the facilities for manufacturing SBSP are in hand modifying them to produce space habitats would be a possibility. Solar sails manufactured in the as deployed condition to go along with the space habitats is another possibility. That is, if economically successful, recycling rocket exhaust could open the solar system from Mercury to Jupiter to economic exploitation.

It is the large demand for materials shipped from the moon for building SBSP that makes the problems with recycling rocket exhaust worth looking at to find a solution. Recycling would require launching rockets horizontally on the surface of the moon instead of launching in the traditional vertical way. The rocket would need to travel about 30 miles downrange within a tube on the surface of the moon for the rocket exhaust to be captured if [the rocket] accelerates at about 30 meters per second squared on average. The tube would need to be quite straight along the intended trajectory to accommodate the rocket reaching orbital velocity of about 1680 meters per second. Thermal management would be a concern in capturing hot rocket exhaust and converting it to cold fuel. Tanks for various process fluids would be needed. Building infrastructure for all needs would need to be done without ambient air for internal combustion engines on construction machinery. Lubricants tend to evaporate in the ambient vacuum of the moon making various bearings difficult to design.

For example, I choose a tube with a diameter of 12 feet. The rocket would be sized to remain about three feet away from the tube walls because the practice of flying aircraft in tight formation on Earth has shown that airplanes can routinely maintain such a distance from one another and rockets have maneuverability comparable to airplanes. I imagine RFID devices would be embedded in the wall of the tube for sensors in the rocket to determine position and velocity as the rocket flies through the tube. A computer would control maneuvers to maintain the proper position in the tube.

The rocket launch tube itself and a considerable array of radiator tubes should be constantly shaded from the sun to help maintain an adequate temperature. This is possible for a tube stretching East and West near the moon's equator by having a shade suspended directly overhead by pillars running with the tube and radiator array in an East-West direction. I propose an anchoring external tube of sintered regolith brick supporting an inner corrugated silicon steel tube for containing the exhaust after the rocket leaves the tube and a door closes. The line of the corrugations of the silicon steel would run circumferentially about the tube so that the steel could thermally expand without changing the length of the tube. The support from the anchoring outer tube would allow the tube to change diameter and shape slightly in response to a change in temperature while maintaining the same length and position. Ethylene glycol and water could be used as a cooling radiator fluid. Other cooling fluids would also be used to help compress and store exhaust awaiting recycling. The final choice of heat transfer fluids remains for the engineers who fix the specifications.

Silicon, iron, regolith and many other materials are available for building these things on the moon so only a small percentage of materials needed to build a rocket exhaust recycling system on the moon would need to be imported from Earth. To build all of this from lunar materials requires remotely controlled industry on the moon to produce the sintered regolith bricks, glass fiber cables, steel and other metals; grade the foundation for the tube and assemble it. The machines necessary to do this would come from Earth with components of the industrial machinery actually made on the moon wherever that is practical. The remote control from Earth should go on with three eight hour shifts of controllers per day. Electrical batteries can power mobile machines and the batteries could be exchanged spent for charged at charging stations. Mobile machines could walk so that all of their bearings could be enclosed in space suits that would retain a nitrogen atmosphere and prevent excessive lubricant evaporation. It is hard to put the wheels of a wheeled vehicle inside a space suit and retain their function. The outside layer of the space suit would not be woven fabric but a plastic film on a smooth surface designed to flex for the necessary motions of the machine. Accordion folds over joints is a possibility. The outer film would wash off and be separated from the dust it collected. Then the outer coating would be reapplied.

The relation of all of this to human space flight is that the enterprise would build a destination that would be worth a human visit. A habitat on the moon with recycling features, shielded from radiation by lunar material and containing a centrifuge to provide necessary exercise for people who come to do indoor work on the moon. No work for humans wearing space suits would be available.

This would be a vast enterprise to produce a vast solution of SBSP for any people on Earth that will accept it.

*There were many comments questions and answers at the meeting.
*One attendee asked what propellant was imagined for the example rocket launching.
*The speaker said that methane and oxygen at 3 kilograms oxygen to one of methane were imagined. This is less oxygen than needed for stoichiometric burning of the fuel but the rich mixture provides about 2500 meters per second exhaust velocity.
*One question was about the launching. The rocket would launch from an electric catapult giving it about 4% of mission delta V and providing ullage thrust for ignition.
*It was suggested that the 4% electric thrust could be increased incrementally as the use of the launching tube developed over years until the rocket was brought to orbital velocity completely by electric thrust. The speaker claimed that Gerard K. O'Neill's mass driver launching of cargo to L5 was limited to one kilogram sized packets because at orbital velocity one kilogram requires as much electric power as is practical for such a device so orbiting a ton-and-a-half cargo to orbital velocity all electrically would be 1500 times what is practical.
*One participant suggested that the impact of the rocket exhaust on the tube would be considerable at the moment of ignition. The speaker suggested that as a flame trench leads exhaust away from rocket launches on Earth, rocket exhaust would be led to the rear during a tube launch. The tube would extend not only down range but also in the opposite direction where it would have a larger diameter. The difference is that on Earth the exhaust is thrown away, with a tube launch it is kept. The participant noted that the volume in the up range direction from the launch point need not be cylindrical but spherical or any shape would do.
*Compartmentalizing the tube with a number of doors that would close behind the rocket as it passed during the tube launch was suggested to preserve the high pressure near the launch point to help the vacuum pumps remove exhaust in this relatively high pressure area. A separate port for drawing off exhaust would serve each compartment. There is some theoretical benefit to this but cooling the exhaust in the whole tube might provide a better distribution of thermal management load if the tube were left as only one compartment. One port for pumping out exhaust would be enough even if more than one pump were attached to the port to provide the most efficient pumping as the conditions of temperature and pressure changed as the last portion to be pumped out was reached. There is only one port for putting air into a car tire or letting it out. That works.
*Why silicon steel for the inner corrugated steel tube? There is more silicon than carbon available on the moon to use.
*How will the exhaust be changed into fuel? Carbon dioxide and carbon monoxide mixed with hydrogen at the right temperature with a catalyst produces methane and water. Electrolysis of the water gives back the hydrogen so it can be used on the next batch of fuel.
*Can exhaust recycling be done only on the moon? No. It could be done at an orbiting fuel depot also. So, a rocket making a trip from the moon to orbiting depot then back and repeating could use the same fuel over and over again. Exhaust lost in recycling would need to be made up from another source.
*A suggestion was made that the launching tube could be shortened to something less than thirty miles, putting the door at the end of the shortened length and making no other change. This would result in the rocket proceeding to orbit passing the end of the tube while the rocket motor was still burning. If the rocket passed out of the tube with three out of fifty-six seconds burn time left then the launching tube would be more than two miles shorter (and cheaper to build) and three seconds of rocket exhaust generation would be wasted. Meanwhile, the launch tube construction robot crew could be occupied building another tube.
*It was suggested that the recycling of rocket exhaust into rocket fuel is in direct competition with Gerard K. O'Neill's concept of a mass driver launching kilogram packets to L5. However, that mass driver plan was never finished to the extent that one could check how much it would cost to build it. In particular, the method of adjusting the aim of the mass driver to compensate for the moon's libration and keeping it aimed at L5 was not presented. Also the means of receiving the cargo at L5 was not described better than calling it a conical catcher. It is likely that these concerns and others could be more easily worked out once the moon is industrialized and research facilities are available on the lunar surface and in cis-lunar space. It is just unlikely that both mass driver cargo launching and rocket exhaust recycling tubes will be built at the same time. Whichever can be finished first should be built first.
*A suggestion of quick acting doors implied that the tube end door would open and close quickly, being open just long enough to let the rocket out of the tube. Actually the launching tube can remain open to the vacuum of space as a rocket is readied at the launching spot. After the freshly launched rocket leaves the tube but before the vanguard of the exhaust gas cloud reaches reaches the end of the tube, traveling at merely the speed of sound, the tube end door would close and remain closed until all rocket exhaust that can practically be pumped from the tube has been removed.
*The meeting is available on YouTube at <nowiki>(https://youtu.be/PqSo-2MeSuU)</nowiki>.

[[Category:Moon Society]]

Recycling Rocket Exhaust presented at Mare Cognitum chapter meeting

2023-05-13T17:34:20Z

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Lunar Phases

2023-05-13T17:32:31Z

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Hi! This page is brand new and under construction. Please check back soon!

Here are some links:

https://en.wikipedia.org/wiki/Lunar_phase

Lunar phases

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#REDIRECT [[Lunar Phases]]

Fluorine Reaction

2023-05-13T17:27:56Z

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{{expand}}
'''Fluorine reaction''' refers to a series of chemical reactions intended to produce [[oxygen]] (and possibly other materials) by the [[reduction]] of [[Lunar Regolith | lunar regolith]]. It is a form of [[In Situ Resource Utilization]].

In the basis process, [[fluorine]] is reacted with the lunar material at elevated temperature. The fluorine attacks the oxides, liberating oxygen and producing fluoride salts. The fluoride salts are then separated into fluorine and reduced metals by [[electrolysis]].<ref>J. Grannec and L. Lozano, "2: Preparative Methods", in the book Inorganic Solid Fluorides, P. Hagenmuller (ed.), Academic Press, NY, 1985, pp. 17-76.</ref>

In a variant version of the process, hydrofluoric acid, rather than gaseous fluorine, is used to attack the lunar material.

The fluorine reaction has the advantage that, since fluorine is more [[electronegative]] than oxygen, fluorine will displace oxygen from any composition of lunar rock. Hence, in principle, the process chemistry does not require finding any particular mineral source, or beneficiation of the soil to enhance the content of a particular mineral.

==Fluorination==
Recently [[Geoffrey A. Landis]] of NASA's [[John Glenn Research Center]] has proposed that the use of the fluoride reaction sequence could be a method by which processing lunar materials could be done to produce [[silicon]] as well as [[iron]], [[aluminum]], and the basic oxide components of [[glass]], which could be used in manufacturing, as well as producing oxygen. In his proposal the fluorine is brought to the moon in the form of [[potassium fluoride]], and is liberated from the salt by electrolysis in a eutectic salt melt. [[Tetrafluorosilane]] produced by this process is reduced to silicon by a [[plasma reduction]] stage; and the fluorine salts are reduced to metals by reaction with metallic [[potassium]] to form potassium fluoride, [[K]][[F]], the original starting material). Fluorine is recovered from residual [[Mg]][[F]] and [[Ca]][[F]]2 by reaction with [[K]]2[[O]].

==Hydrofluoric Acid Leach==

While a far more complex reaction sequence, the primary benefit of the HF acid leach system is much lower reaction temperatures. Lower temperature requirements result in a lower energy input and power savings which can be used for other life support functions.

{{expandsec}}

==Reaction Materials==
The system used to carry out any reaction must be well suited and as inert as possible towards the reactants.

*When the fluoride salt is put through electrolysis, the neutral charge of the ions is restored and fluorine gas is produced. Fluorine, like other elements, is more reactive in its unionized state. The gas is highly reactive and tends to cause stress crack corrosion in many kinds of metal piping. This issue can be mitigated at lower temperatures by coating the inside of metal pipes with Teflon. Teflon is also a excellent material for low temperature gaskets.

*The eutectic melt and electrolysis will need to be carried out in a suitable container. Nickel and Monel crucibles, using copper gaskets, are compatible with the fluorine gas. At higher temperatures platinum crucibles would be needed, but the eutectic electrolysis should have a temperature low enough that platinum isn't required.

{|
| COLSPAN="4" | <CENTER>'''Common/Main Materials Used to Handle Fluorine'''<ref>(P. S. Gakle, et al., "Design Handbook for Liquid Fluorine Ground Handling Equipment, Aerojet-General Corp., WADD TR-60-159,December 1960</ref></CENTER>
|-
| STYLE="width:1in;" | ''Material''
| STYLE="width:1.5in;" | ''Highest Working Temperature (C)''
| STYLE="width:1.5in;" | ''Gaseous Fluorine Use''
| STYLE="width:1.5in;" | ''Liquid Fluorine Use''
|-
| Nickel
| 650
| Lines, fittings, flanges, storage tanks
| Lines, fittings, flanges, storage tanks
|-
| Monel
| 550
| Lines, fittings, flanges, valves, storage tanks, valve bellows
| Lines, fittings, flanges, valves, storage tanks, valve bellows
|-
| Copper
| 400
| Lines, fittings, flanges, valve seats, gaskets
| Lines, fittings, flanges, valve seats, gaskets
|-
| Brass
| 200, low pressure
| Lines, fittings, flanges, valve bodies
| ---
|-
| Stainless Steel
| 200
| Lines, fittings, flanges, storage tanks, valve bodies
| Lines, fittings, flanges, storage tanks, valve bodies
|-
| Aluminum
| 400
| Lines, fittings (Al 2017), 2024), gaskets (Al 1100)
| Lines, fittings (Al 2017), 2024), gaskets (Al 1100)
|-
| Teflon
| 80
| Valve packing (low static pressure), gaskets
| Valve packing (low static pressure), gaskets
|-
|}

==External Links==
*[http://gltrs.grc.nasa.gov/citations/all/tm-2005-214014.html paper "Materials Refining for Solar Array Production on the Moon"]
*[http://adsabs.harvard.edu/abs/1991rnes.nasa...11S abstract "Oxygen extraction from lunar soil by fluorination" (1991)] (PDF)

==References==
<references/>

[[Category:Chemistry]]
[[Category:ISRU]]

Fluorine reaction

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#REDIRECT [[Fluorine Reaction]]

Talk:Fluorine Reaction

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How do you propose to mitigate flourine induced stress crack corrosion in your piping? Teflon can be used in some piping but has temperature limitations. Is there an inert refractory material that could be used as a crucible for the salt melt or a lining in the plasma reduction stage? -- [[User:Jarogers2001|Jarogers2001]] 21:15, 13 March 2007 (PDT)

== Materials ==

Nickel and Monel crucibles, using copper gaskets, are compatible with the fluorine gas. Teflon is appropriate for gaskets and tubing at lower temperatures. At higher temperatures, platinum crucibles would be needed, but the eutectic electrolysis should have a temperature low enough to that platinum isn't required. See J. Grannec and L. Lozano, "2: Preparative Methods", in the book Inorganic Solid Fluorides, P. Hagenmuller (ed.), Academic Press, NY, 1985, pp. 17-76.
[[User:Geoffrey.landis|Geoffrey.landis]] 07:23, 14 March 2007 (PDT)

----
I have an Inter-Library Loan request pending for "Inorganic Solid Fluorides: Chemistry and Physics (Materials Science and Technology Series) (Hardcover)" by Paul Hagenmuller as of this date. Hopefully I will have it before ISDC.

[[User:Jarogers2001|Jarogers2001]] 14:56, 9 May 2007 (UTC)

== A reference ==

Do we have a general page on oxygen extraction techniques? One reference I found useful as an overview was ''The Moon: Resources, Future Development, and Colonization'', by David Schrunk, Burton Sharpe, Bonnie Cooper and Madhu Thangavelu. From my review over in adb:

"In particular Appendix E's coverage of oxygen extraction is extremely thorough, and the authors, while finding it somewhat difficult to directly compare techniques, find 4 of the approaches worthy of considerable further research: hydrogen reduction of glass, magma electrolysis, sulfuric acid dissolution/electrolysis, and ion sputtering."

[[User:Apsmith|Apsmith]] 14:05, 15 June 2007 (UTC)

:We have [[LUNOX]] and [[ISRU]]. That's all that I am aware of at the moment.

: -- [[User:Jarogers2001|Jarogers2001]] 17:45, 15 June 2007 (UTC)

Talk:Fluorine reaction

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List of Architectural Concepts

2023-05-13T17:27:30Z

Strangelv: Capitalization

{{Bootstrap}}

[[Architecture Research]] 
[[Modular Architecture Systems]] 
[[Surface Structure Architecture]] 
[[Shielded Canopies]] warehouses, flare sheds 
[[Building and Manufacturing Materials]] 
[[Construction Systems]] 
[[Water Conserving Manufacturing Processes]] that need little or no water or which recycle them 
[[Dayspan-Nightspan Operations management]] 
[[Dayspan Power Storage]] 
[[Dust Control Systems]] 
[[Warehousing Systems Research]] 
[[Lunar-Appropriate Industrial Design]] 
[[MUS cle Design Projects]] 
:* "MUS" (massive, unitary [many of them], simple) subassemblies appropriate for Lunar Industry
:* "cle" (complex, lightweight, electronic) subassemblies best manufactured on Earth
[[Easily Disassembled Assembly Methods]] that are disassembly-friendly for proper recycling

Business Plan Form

2023-05-13T17:25:57Z

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{|align=right

|__TOC__

|}

 Full Name Here Near (Mid)-Term Business Plan Summary 

----

==How to Start a New Lunar Business Plan==

You can add a plan.

===Setting Up a new plan===

Start in the [[Business Plans List]] and think of a name for the idea; something short, one or two words that are easy to guess and easy to remember. This will serve as the idea’s reference name. Enter Edit and add the Reference Name into the Business Plans List as a link with a short description. You may put it wherever you think it fits. After you finish, save the page and the reference name should appear in red.

Alternatively, you can use one of the ideas already provided on this list, already shown in red.

Click on the red entry to take you to the new entry edit form. Follow these guidelines to write the business plan for your idea using whatever editor you like. You may choose to cut and paste this form into your editor as a starting place. This outline is only a suggestion; feel free to modify it to suit your business practices.

===Top of the Page===

Near the top enter the full title of your idea. This is usually two lines with a descriptive title for the first line and the second line: “Near-Term Business Plan Summary” or a reference to another scenario.

Include the following warning near the top of the Page:

'''Warning''' – Do '''not''' include proprietary information in this document.

----

==Introduction==

Describe what your idea is about in one clear paragraph.

State if your idea is under the [[Near-Term Business Scenario]], [[Mid-Term Business Scenario]], or a scenario you propose.

==Why this Idea will work==

State all the good reasons this idea will make money. This entry can be up to one full page. You may think of it as a sales pitch.

==Technical Details==

Here is where you need to really get into the nitty-gritty. Describe how your plan to do it. How will you get your product or service to market? Why do people on the Moon have an advantage in this field? Include links to other Lunarpedia articles and provide outside references to Internet URL’s.

==Financial Details==

How much money will this idea make? How much will it cost? How much capital will you need to get started?

Some business plans may be supported by a short Excel spreadsheets. For other plans the best you may be able to do at this time is to say To Be Determined (TBD).

A proper business plan must include much detailed financial analysis. This level of detailed information is however proprietary to the persons presenting the plan and their financial backers. For this reason only a financial summary should be include in Lunarpedia business plans.

==Truth to Investors==

We need to point out the weak points of the idea to be honest with potential investors. You can phrase these in terms of challenges to be over come.

==Strong Finish==

End with a strong "can do" statement.

----

Return to [[Business Plans List]].

----

When you are done, place an entry in the Discussion Tab. Why you thought this was a good enough idea to write up.
Include an electronic signature.

----

[[Category:Business]]

[[Category:Business_Plans]]

Business Plan form

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Talk:Business Plan Form

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I hope you find this helpful. Any contributions will be greatly helpful to us!

--[[User:Jriley|Jriley]] 13:40, 31 May 2007 (UTC)
----

Talk:Business Plan form

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Sand casting

2023-05-13T17:25:01Z

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#REDIRECT [[Sand Casting]]

Sand Casting

2023-05-13T17:25:00Z

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Engineering details might seem dull or trivial, but
they can make or break us. There won't be any ISRU and
bootstrapping on the Moon without metal casting. Three
dimensional printers that use lasers or electron beams
(which require vacuum, free on Luna) to fuse powdered
metals, glass and/or ceramic into small parts that can fit
in the hand and medium size parts with dimensions of
one or two feet will be used to produce all sorts of parts
on the Moon. Barring the creation of giant 3D printers we
will need to cast large metal parts on the Moon like
vehicle chassis frame members, axles, wheels, struts, etc.
When we can we will use rolling mills and/or extruders to
make things, but we might want to cast up the rolling
mills and extruders with lunar materials rather than ship
these massive devices to the Moon!
Aluminum and magnesium are often sand-cast
but they might also be cast in plaster molds with plaster
obtained by sulfuric acid leaching of highland regolith.
Plaster, CaSO4, is also a cement setting time retardant
and Portland cement contains up to 5% of this compound
by weight. Iron, steel and iron alloy (e.g. iron-aluminides,
iron-silicon, iron-manganese, iron-nickel) casting is
going to require sand molds. Foundry sand, also called
green sand, is made of either silica or olivine sand, two
substances we have on the Moon, water that can be
obtained in various ways and rigorously recycled,
bentonite clay and sometimes pulverized coal (forget coal
on the Moon). We will have to do casting in pressurized
chambers with dehumidifiers to recover water vapor from
the drying sand mold and powerful cooling systems
because it will get very hot inside when working with
molten metals and interior pressure will increase as
temperature increases. Casting chambers will be built of
metal and concrete, not Kevlar!
Here's the detail I am hung up on; there is no
clay on the Moon because there was never any water for
the hydrological processes that produce clay to occur.
Clay is essential to bind the sand mold. We might be able
to synthesize clay on the Moon. At:
w w w.patentstorm.us/patents/6565643/description.htm l
we read that, "U.S. Pat. No. 3,803,026 describes a
process for preparing a clay-type material in which an
amorphous gel comprising silicon oxide, aluminum
oxide, and, e.g., magnesium oxide is subjected to a
high-temperature ageing step in an autoclave.
C.R. Acad. Sc. Paris 7 292 describes a process for
preparing, int. al., clays comprising aluminum, silicon,
and, e.g., magnesium by way of a co-precipitation
process." Silicon, aluminum, magnesium and their oxides
exist on the Moon. I suspect that it will be more practical
to synthesize clay on the Moon than upport it from Earth!
It is also possible to bind foundry sand with resin. At
http://en.wikipedia.org/wiki/Shell_molding we read:
""Shell molding, also known as shell-mold
casting, is an expendable mold casting process that uses
a resin covered sand to form the mold. As compared to
sand casting, this process has better dimensional
accuracy, a higher productivity rate, and lower labor
requirements. It is used for small to medium parts that
require high precision. Examples of shell-molded items
include gear housings, cylinder heads and connecting
rods. It is also used to make high-precision molding cores"
The Wiki article states that this is used for small
to medium sized parts so we might still need clay for
large part casting. Resin could be made in lunar labs and
we would need some way to recycle it possibly by
leaching unused resin out of spent molds with an organic
solvent and by extracting vaporized resin from air and
CO2 from burnt resin. Resin will contain rare lunar
elements like H, C and N, and we cannot afford to waste
these. If we cast in chambers with inert gas filled interiors
the resin won't burn to form CO2 and other gases.
If we can synthesize clay on the Moon,
and i suspect that we can and must, and do it cheaply,
then we could even work clay and fire it with electric
furnaces into pottery and other desirable items. That
would be a nice added benefit. An unconventional
approach to metal casting on the Moon might be the use
of microwave sintered regolith molds, but data is lacking.
This should be investigated.

[[Category:Industrial Production]]

Talk:VASIMR lunar tug

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VASIMR Lunar Tug

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A [[VASIMR]] powered lunar tug can carry twice the payload to the moon than ordinary chemical propulsion. The tug would be launched once and placed in orbit around Earth. It would unfold large solar panels. A payload would then be launched from Earth, including fuel for the tug. The tug would then spiral out towards the moon, in a process taking six months. The cargo lander would then detach and land near the lunar base. The tug would then presumably slingshot around the moon and aerobrake back into Earth orbit, where it could wait for another payload.

===Advantages===
*Twice the payload compared to chemical
*Reusable
*Does not need a nuclear power source

===Disadvantages===
*VASIMR is untested
*The solar panels are very large.
* The tradeoff for the larger payload is a six month travel time. This is to long for humans to stay in the van allen belts, and is why manned travel will use chemical propulsion.

==See Also==
*[[List of Propulsion Systems]]

[http://www.youtube.com/watch?v=ZXofYP_VfUg Youtube video]

[[Category:Robots]]
[[category:Space Transport]]

VASIMR lunar tug

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Talk:VASIMR Lunar Tug

2023-05-13T17:23:44Z

Strangelv: Strangelv moved page Talk:VASIMR lunar tug to Talk:VASIMR Lunar Tug: Capitalization

*Solar sails could be folded for aerobraking since at that time their full power will not be needed, but they might be sturdy enough as is. Aerobraking high enough in the atmosphere provides only gentle forces, but enough to bring the apogee down as low as desired by multiple passes.--[[User:Farred|Farred]] 16:49, 7 August 2009 (UTC)

List of People

2022-10-06T21:45:15Z

Strangelv: Quick pass towards a brief identification of each person

{{Bootstrap}}

'''This list needs to be a rather long one. It is presently VERY incomplete.'''

'''If you're searching for a name that's not here, assume it belongs.'''

'''This list presently contains multiple messes that may or may not be obvious or easy to notice'''

'''This list may belong on the general space wiki'''



=='''A'''==
[[Sandra Lee Adamson]] 
[[Larry Ahearn|Laurence Ahearn]] 
[[Mark Albrecht]] 
[[Pete Aldridge]] 
[[Buzz Aldrin]] (Apollo astronaut) 
[[Christian Andersen]] 
[[Eric Anderson]] 
[[Greg Allison]]  
[[Robert Allnutt]] 
[[David Anderman]] 
[[Neil Armstrong]] (Apollo astronaut) 
[[Cindy Askins]] 
[[Norman R Augustine]] 
[[Joseph Ausmann]]  

=='''B'''==
[[Michael Bakk]] 
[[Peter Banks]] 
[[Gary Barnhard]] 
[[David Baxter|J David Baxter]] 
[[Richard Beers]] 
[[Dallas Beinhoff]] 
[[Jim Bennett]] 
[[Greg Bennett]] (Founder of Artemis Project, ASI, TLRC, and the Moon Society) 
[[Jim Benson]] 
[[Robert Bigelow]] (Bigelow Aerospace) 
[[Thomas L. Billings]] 
[[Alan B. Binder]] 
[[Brian Binnie]] 
[[Paul Blase]] (prominent ASI member) 
[[B.J. Bluth]] 
[[Frank Borman]] 
[[Stanley Borowski]] 
[[Fred Bourgeois|Fred J Bourgeois]] ([[User:Fjb|user page]]) 
[[Ben Bova]] (Author) 
[[Bruce Boxleitner]] (actor) 
[[Tycho Brahe]] (astronomer) 
[[Daniel Brandenstein]] 
[[David Brandt]]  
[[Frank Braun]] 
[[Maria von Braun]] 
[[George Brown, Jr.]]  
[[Mike Brown]] 
[[Rhoda Bryant]] (Prominent ASI member and member of Cyberteams) 
[[James Burk|James L Burk]] (Prominent member of Moon and Mars societies) 

=='''C'''==
[[Tim Caldwell]] (Founder and former owner of [[Lunar Traders]]) 
[[Ed Cameron]] 
[[Mac Canter]] 
[[Chris Carberry]] 
[[John Carmack]] (Owner and founder of Armadillo Aerospace) 
[[Gerald P. Carr]] 
[[Dana Carson]] (Founding member of Artemis Project, ASI, TLRC, and Moon Society) 
[[Henry Cate]] 
[[Mark R. Chartrand]] 
[[Brian Chase]] 
[[C.J. Cherryh]] 
[[Murray G. Clark]] 
[[Arthur C Clarke]] (Author) 
[[Libby Clarke]] 
[[Bill Clawson]] (MOon Society member and engineer) 
[[Michael Coates]] 
[[Michael Collins]] (Apollo astronaut) 
[[Patrick Collins]] 
[[Pete Conrad]] (Apollo astronaut) 
[[Nicolaus Copernicus]] 
[[Richard D. Core]] 
[[Jacques Cousteau]] (undersea explorer) 
[[David Criswell]]  

=='''D'''==
[[Thomas Dahm]] 
[[Pat Dasch]] 
[[Harry S. Dawson]] 
[[Michael DeBakey]] 
[[Mike Delaney]] (Moon Society listmaster) 
[[John Denver]] 
[[Peter Diamandis]] 
[[Franklin R. Chang Diaz]] 
[[Rosalie Dieteman]] [[User:Miros1|(user page)]] 
[[David Dietzler]] (prominent Moon Society member) 
[[Taylor Dinerman]] 
[[Chuck Divine]] 
[[Don Doughty]] 
[[Eric Douglass]] 
[[Hugh Downs]] 
[[K. Eric Drexler]] 
[[Charlie Duke]] 
[[Art Dula]] 
[[David A. Dunlop]] 
[[Steve Durst]] 
[[Esther Dyson]] 
[[Freeman Dyson]] (polymath physicist) 
[[Marianne Dyson]] (author) 

=='''E'''==
[[Peter Eckart]] 
[[Sharon Elbert]] 

=='''F'''==
[[Edward R. Finch]] 
[[Eric Fischer]] 
[[Carly Fiorina]] 
[[Stephen Fleming]] 
[[Aaron Freeman]] 
[[Louis Friedman]] 
[[Jeff Foust]] 
[[Mike Fulda]] 
[[William Fung-Schwarz]] 
[[Don Fuqua]] 

=='''G'''==
[[Robby Gaines]] 
[[Galileo Galilei]] (astronomer and physicist) 
[[Scotty Gamenthaler]] 
[[Bill Gardiner]] 
[[Lori Garver]] (NSS and NASA) 
[[James Gholston]] (moon society) 
[[Michael Gilbrook]]  
[[Newt Gingrich]] (prominent politician) 
[[Peter Glaser]] 
[[John Glenn]] (Mercury astronaut) 
[[Al Globus]] 
[[Rich Godwin]] 
[[Bob Goetz]] 
[[Barry Goldwater]] (prominent politician) 
[[Slade Gordon]]  
[[Slade Gorton]] 
[[Bob Gounley]]  
[[Francis Govers|Francis X Govers III]] 
[[Paul Graham]] 
[[Gary Grahn]] 
[[Gary Gray]] 
[[Jerry Grey]] 

=='''H'''==
[[Gay Haldeman]] 
[[Joe Haldeman]] 
[[John C. Hamilton]] 
[[Tom Hanks]] (prominent actor) 
[[Bruce Hapke]] 
[[Paul Hardersen]] 
[[Shelley A. Harrison]] 
[[Glenn Heinmiller]] 
[[Eleanor Helin]] 
[[H Kieth Henson]] 
[[John Higginbotham]] 
[[Bill Higgins]] 
[[Robert L. Hillhouse]] 
[[Bob Hope]] (prominent comedian and actor) 
[[Mark Hopkins]] 
[[Mark Holthaus]] 
[[Matt Holthaus]] 
[[Rick Homans]] 
[[S. Neil Hosenball]] 
[[George Howard]] 
[[Barbara Max Hubbard]] 
[[Scott Hubbard]] 
[[Gary Hudson]] 
[[Max Hunter]]  

=='''I'''==
[[Kirby Ikin]] 

=='''J'''==
[[Michael P. Jackson]] 
[[Steve Jackson]] (owner of Artemis Project company SJ Games) 
[[Niklas Jarvstrat]] 
[[Robert Jastrow]] 
[[Dana J. Johnson]] 
[[John Johnson]] 
[[Margaret Jordon]] 

=='''K'''==
[[Irving Kahn]] 
[[Arthur Kantrowitz]] 
[[Kathy Keeton]] 
[[Hugh Kelliher]] 
[[Johannes Kepler]] 
[[Doug King]] 
[[Cindy Klinger]] 
[[Terry R. Kok]] 
[[Peter Kokh]] (MMM founding editor) 
[[Greg Kulka]] 

=='''L'''==
[[Alan Ladwig]] 
[[Ronnie M. Lajoie]] 
[[Nick Lampson]] 
[[Geoffrey A. Landis]] (aerospace engineer) 
[[Carol Lane]] 
[[Rebecca Lauer]] 
[[Laurie Leshin]] 
[[John Lewis]] 
[[Byron Lichtenberg]] 
[[T. D. Lin]] (inventor of low-water regolith concrete) 
[[Jeff Liss]]  
[[Gary Lofgren]] 
[[David Logsdon]] 
[[John M. Logsdon]] 
[[James Lovell]] (astronaut) 
[[Shannon Lucid]] (astronaut) 
[[Brian Lundquist]] 
[[Lester L. Lyles]] 

=='''M'''==
[[Bruce Mackenzie|Bruce A. Mackenzie]] (prominent space activist) 
[[Jay Manifold]] (blogger) 
[[Hans Mark]] 
[[Cliff Marko]] 
[[David Masten]] (founder of Masten Systems) 
[[Robert McCall]] 
[[Tim McEgan]] 
[[Amy McGovern]] (Moon Society member and roboticist) 
[[Harold W. McGraw, Jr.]] 
[[David McKay]] 
[[Johanna McKinzey]] 
[[Cliff McMurray ]] 
[[Michael Mealling]] 
[[Karen Mermel]] 
[[Pat Montoure]] 
[[Kenneth Money]] 
[[David Millman]]  
[[Marvin Minsky]] 
[[Ken Money]] 
[[Frank Moss]] 
[[Ben Muniz]] 

=='''N'''==
[[Florence Nelson]] 
[[Nichelle Nichols]] 
[[David Nieds]] 
[[Larry Niven]] (Known Space author) 
[[Stewart Nozette]] 

=='''O'''==
[[Jack Olsen]] 
[[Gerard O'Neill|Gerard K. O'Neill]] 
:Founder of the [[Space Studies Institute]]
:Publications include:The High Frontier, Third Edition by Gerard K. O'Neill (2000) (ISBN: 0-9622379-0-6) http://ssi.org/?page_id=12

[[Frederick I Ordway III]] 
[[Sandra Orellana]] 

=='''P'''==
[[Scott Pace]] 
[[Chris Pancratz]]  
[[Candace Pankanin]] 
[[Seema Patel]] 
[[Lane Patterson]] 
[[Robert Pearlman]]  
[[Chris Peterson]] 
[[Tim Pickens]] 
[[Ann Pierce]] 
[[Carle Pieters]] 
[[Kristin Pilotte]] 
[[Jim Plaxco]] (prominent NSS member) 
[[Bill Pogue]] 
[[Craig Dale Porter]] 
[[Seth Potter]] 
[[Josh Powers]]  
[[Darel Preble]] 
[[Chip Proser]] (producer) 
[[Jeremy Pyle]] 

=='''R'''==
[[Charles Radley]] (Moon Society member and engineer) 
[[Dan Rasky]] 
[[Joe A. Redfield]] 
[[Harry Reed]] 
[[Glenn H. Reynolds]] 
[[Rex Ridenoure]] 
[[Keil Ritterpusch]] 
[[Kim Stanley Robinson]] (author) 
[[Majel Barrett Roddenberry]] (actress) 
[[Henk Rogers]] 
[[Harold A. Rosen]] 
[[Stan Rosen]]  
[[Nancy Rosenberg]] 
[[Laurinda Rohn]] 
[[Greg G Rucker]] 
[[Karen Rugg]] 
[[Bennett Rutledge]] 
[[Neil Ruzic]] 

=='''S'''==
[[Phil Sadler]] 
[[Carl Sagan]] (astronomer and author) 
[[Karen Savage]] 
[[Terry C Savage]] 
[[Chuck Schlemm]] 
[[Greg Schmidt]] 
[[Stanley Schmidt]] 
[[Harrison Schmitt]] (astronaut) 
[[Frank Schowengerdt]] 
[[John R. Schrock]] (Moon Society member) 
[[Diana Schroeder]] 
[[David Schrunk]] 
[[Peter J. Schubert]] 
[[Rusty Schweickart]] 
[[Ken Schwetje]] 
[[Frederick Seitz]] 
[[Randall Severy]] (Prominent ASI/TLRC/Moon Society member) 
[[Burton Sharpe]] 
[[Donna Shirley]] 
[[Rand Simberg]] 
'''Rand Simberg''' [http://transterrestrial.com/ operates a blog site] called [[Transterrestrial Musings]].

[[Frank Sietzen]] 
[[Vivian Silver]] 
[[John B. Slaughter]] 
[[Yvonne Spencer]] 
[[Paul Spudis]] (Lunar geologist) 
[[Steve Squyres]] 
[[Arthur Smith]] (Moon Society member and physicist) 
[[Ben Smith]] (Lunar Homestead/Moon Society) 
[[Daniel F. Smith]] 
[[George Smith]] 
[[Shirley Smith]] 
[[Dick Steffens]] 
[[Carol Stoker]] 
[[John Strickland]] 
[[Ian Randal Strock]] (Publisher and prominent member of ASI/TLRC/Moon Society) 
[[Louis Szathmary]] 

=='''T'''==
[[Yuki D. Takahashi]] 
[[Madhu Thangavelu]] (Lunar researcher) 
[[Marty Trumbore]] 
[[Neil deGrasse Tyson]] (astrophysicist) 

=='''V'''==
[[Peter Vajk]] 
[[Joe Valenti]] 
[[Lee Valentine]] 
[[James A. Van Allen]] (astrophysicist) 
[[Rosalie Vega]] 
[[Jeff Volosin]] 
[[Werner von Braun]] (rocket engineer) 

=='''W'''==
[[Richard Wagner]] 
[[Bryce Walden]] (Oregon L5) 
[[Charles D. Walker]] 
[[Robert S. Walker]] 
[[Elaine Walker]] 
[[Craig E Ward]] 
[[Alan B Wasser]] 
[[David Wetnight]] (Moon Society) ([[user:davew|user page]]) 
[[Jay Wittner]] (prominent NSS member; Integrated Space Plan) 
[[Diana Whay]] 
[[Dennis Whipple]] 
[[Wayne White]] 
[[Joe Whitebread]] 
[[George T. Whitesides]] 
[[Glen P. Wilson]] 
[[Sherry Wilson]] 
[[Stu Witt]] 
[[Annette S Wood]] 
[[Gordon R Woodcock]] 
[[Pete Worden]] (prominent NASA person) 
[[James B. Wyeth]] 

=='''Y'''==
[[Cheryl Lynn York]] (Oregon L5) 
[[Phillip Young]] 

=='''Z'''==
[[Veronica Zabala-Aliberto]] 
[[Laurinda Zeman]] 
[[Lynne Zielinski]] 
[[Greg Zsidisin]] 
[[Maria T. Zuber]] 
[[Robert Zubrin]] (Mars Society founder)

Oganesson

2021-11-17T12:13:39Z

Strangelv: Strangelv moved page Ununoctium to Oganesson: It's gotten a permanent name since 2007

{{Element |
name=Ununoctium |
symbol=Uuo |
available=unavailable |
need= |
number=118 |
mass=[293] |
group=18 |
period=7 |
phase= |
series=Noble gases |
density= |
melts= |
boils= |
isotopes=none |
prior=[[Ununseptium|Uus]] |
next=N/A |
above=[[Radon|Rn]] |
aprior=[[Astatine|At]] |
anext=N/A |
below=N/A |
bprior=N/A |
bnext=N/A |
radius= |
bohr= |
covalent= |
vdwr= |
irad= |
ipot= |
econfig=1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 5f14 6s2 6p6 6d10 7s2 7p6 |
eshell= |
enega= |
eaffin= |
oxstat= |
magn= |
cryst= |
}}

'''Ununoctium''' is a Noble gas in group 18.
It does not have any isotopes considered to be natural. Its longest-lived known isotope has an atomic number of 293.
This element has no stable isotopes.
 

[[Category:Nonmagnetic Elements]]
[[Category:Gases]]
[[Category:Noble Gases]]

Ununoctium

2021-11-17T12:13:39Z

Strangelv: Strangelv moved page Ununoctium to Oganesson: It's gotten a permanent name since 2007

#REDIRECT [[Oganesson]]

Talk:Oganesson

2021-11-17T12:13:39Z

Strangelv: Strangelv moved page Talk:Ununoctium to Talk:Oganesson: It's gotten a permanent name since 2007

Is there a reason for elements like Ununoctium to be on Lunarpedia? They aren't "real" in the sense that they do not occcur naturally. They therefore ''definatly'' aren't available on the moon and they don't have any uses. Maybe a merge to a list of "Articficial heavy elements"? [[User:T.Neo|T.Neo]] 07:44, 22 October 2008 (UTC)

:The existence of this article and others for elements we've not seen non-fleeting isotopes for is more or less a result of how we structured things. Erring on the side of including everything also eliminated the need to have a contentious debate over what elements to include (I've seen too many of those and have been glad we haven't for awhile -- fiction on Lunarpedia and the logo for Marspedia come painfully to mind as topics that got far more heated than I had any clue to anticipate), as not all cases are as clear as Ununoctium or Oxygen, and as Wikipedia has demonstrated, if there's any conceivable reason for someone declaring something should be deleted, it will happen -- and we don't want that sort of thing going on here. Also, given the script that created everything, it wasn't exactly a great amount of marginal work to include this element -- most of the work was the sunken cost of writing the script and stuffing together the database it used.

:The centerpiece of our atomic element structure is [[Periodic Table of the Elements|here]]. -- [[User:Strangelv|Strangelv]] 14:21, 22 October 2008 (UTC)

::I included man made elements in the original database in order to err on the side of caution. Better to have it and not need it than to need it and not have it. - [[User:Jarogers2001|Jarogers2001]] 15:08, 22 October 2008 (UTC)

Talk:Ununoctium

2021-11-17T12:13:39Z

Strangelv: Strangelv moved page Talk:Ununoctium to Talk:Oganesson: It's gotten a permanent name since 2007

#REDIRECT [[Talk:Oganesson]]

Livermorium

2021-11-17T12:13:31Z

Strangelv: Strangelv moved page Ununhexium to Livermorium: It's gotten a permanent name since 2007

{{Element |
name=Ununhexium |
symbol=Uuh |
available=unavailable |
need= |
number=116 |
mass=[292] |
group=16 |
period=7 |
phase= |
series=Poor Metals |
density= |
melts= |
boils= |
isotopes=none |
prior=[[Ununpentium|Uup]] |
next=[[Ununseptium|Uus]] |
above=[[Polonium|Po]] |
aprior=[[Bismuth|Bi]] |
anext=[[Astatine|At]] |
below=N/A |
bprior=N/A |
bnext=N/A |
radius= |
bohr= |
covalent= |
vdwr= |
irad= |
ipot= |
econfig=1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 5f14 6s2 6p6 6d10 7s2 7p4 |
eshell= |
enega= |
eaffin= |
oxstat= |
magn= |
cryst= |
}}
'''Ununhexium''' is a Poor Metal in group 16.
It does not have any isotopes considered to be natural. Its longest-lived known isotope has an atomic number of 292.
This element has no stable isotopes.
 

{{Autostub}}
[[Category:Poor Metals ]]

Ununhexium

2021-11-17T12:13:31Z

Strangelv: Strangelv moved page Ununhexium to Livermorium: It's gotten a permanent name since 2007

#REDIRECT [[Livermorium]]

Moscovium

2021-11-17T12:13:26Z

Strangelv: Strangelv moved page Ununpentium to Moscovium: It's gotten a permanent name since 2007

{{Element |
name=Ununpentium |
symbol=Uup |
available=unavailable |
need= |
number=115 |
mass=[288] |
group=15 |
period=7 |
phase= |
series=Poor Metals |
density= |
melts= |
boils= |
isotopes=none |
prior=[[Ununquadium|Uuq]] |
next=[[Ununhexium|Uuh]] |
above=[[Bismuth|Bi]] |
aprior=[[Lead|Pb]] |
anext=[[Polonium|Po]] |
below=N/A |
bprior=N/A |
bnext=N/A |
radius= |
bohr= |
covalent= |
vdwr= |
irad= |
ipot= |
econfig=1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 5f14 6s2 6p6 6d10 7s2 7p3 |
eshell= |
enega= |
eaffin= |
oxstat= |
magn= |
cryst= |
}}
'''Ununpentium''' is a Poor Metal in group 15.
It does not have any isotopes considered to be natural. Its longest-lived known isotope has an atomic number of 288.
This element has no stable isotopes.
 

{{Autostub}}
[[Category:Poor Metals ]]

Ununpentium

2021-11-17T12:13:26Z

Strangelv: Strangelv moved page Ununpentium to Moscovium: It's gotten a permanent name since 2007

#REDIRECT [[Moscovium]]

Flerovium

2021-11-17T12:13:22Z

Strangelv: Strangelv moved page Ununquadium to Flerovium: It's gotten a permanent name since 2007

{{Element |
name=Ununquadium |
symbol=Uuq |
available=unavailable |
need= |
number=114 |
mass=[289] |
group=14 |
period=7 |
phase= |
series=Poor Metals |
density= |
melts= |
boils= |
isotopes=none |
prior=[[Ununtrium|Uut]] |
next=[[Ununpentium|Uup]] |
above=[[Lead|Pb]]|
aprior=[[Thallium|Tl]] |
anext=[[Bismuth|Bi]] |
below=N/A |
bprior=N/A |
bnext=N/A |
radius= |
bohr= |
covalent= |
vdwr= |
irad= |
ipot= |
econfig=1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 5f14 6s2 6p6 6d10 7s2 7p2 |
eshell= |
enega= |
eaffin= |
oxstat= |
magn= |
cryst= |
}}
'''Ununquadium''' is a Poor Metal in group 14.
It does not have any isotopes considered to be natural. Its longest-lived known isotope has an atomic number of 289.
This element has no stable isotopes.
 

{{Autostub}}
[[Category:Poor Metals ]]

Ununquadium

2021-11-17T12:13:22Z

Strangelv: Strangelv moved page Ununquadium to Flerovium: It's gotten a permanent name since 2007

#REDIRECT [[Flerovium]]

Nihonium

2021-11-17T12:10:42Z

Strangelv: Strangelv moved page Ununtrium to Nihonium: It's gotten a permanent name since 2007

{{Element |
name=Ununtrium |
symbol=Uut |
available=unavailable |
need= |
number=113 |
mass=[284] |
group=13 |
period=7 |
phase= |
series=Poor Metals |
density= |
melts= |
boils= |
isotopes=none |
prior=[[Ununbium|Uub]] |
next=[[Ununquadium|Uuq]] |
above=[[Thallium|Tl]] |
aprior=[[Mercury|Hg]] |
anext=[[Lead|Pb]]|
below=N/A |
bprior=N/A |
bnext=N/A |
radius= |
bohr= |
covalent= |
vdwr= |
irad= |
ipot= |
econfig=1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 5f14 6s2 6p6 6d10 7s2 7p1 |
eshell= |
enega= |
eaffin= |
oxstat= |
magn= |
cryst= |
}}
'''Ununtrium''' is a Poor Metal in group 13.
It does not have any isotopes considered to be natural. Its longest-lived known isotope has an atomic number of 284.
This element has no stable isotopes.
 

{{Autostub}}
[[Category:Poor Metals ]]

Ununtrium

2021-11-17T12:10:42Z

2021-11-17T05:00:51Z

Strangelv: 1 revision imported

#REDIRECT: [[American Institute of Aeronautics and Astronautics]]

ADB

2021-11-17T05:00:51Z

Strangelv: 1 revision imported

#REDIRECT: [[Artemis Data Book]]