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posted by chromas on Wednesday August 08 2018, @08:48PM   Printer-friendly
from the don't-tell-the-little-green-men dept.

SpaceX organizes inaugural conference to plan landings on Mars

No one can deny that SpaceX founder Elon Musk has thought a lot about how to transport humans safely to Mars with his Big Falcon Rocket. But when it comes to Musk's highly ambitious plans to settle Mars in the coming decades, some critics say Musk hasn't paid enough attention to what people will do once they get there.

However, SpaceX may be getting more serious about preparing for human landings on Mars, both in terms of how to keep people alive as well as to provide them with something meaningful to do. According to private invitations seen by Ars, the company will host a "Mars Workshop" on Tuesday and Wednesday this week at the University of Colorado Boulder. Although the company would not comment directly, a SpaceX official confirmed the event and said the company regularly meets with a variety of experts concerning its missions to Mars.

This appears to be the first meeting of such magnitude, however, with nearly 60 key scientists and engineers from industry, academia, and government attending the workshop, including a handful of leaders from NASA's Mars exploration program. The invitation for the inaugural Mars meeting encourages participants to contribute to "active discussions regarding what will be needed to make such missions happen." Attendees are being asked to not publicize the workshop or their attendance.

The meeting is expected to include an overview of the spaceflight capabilities that SpaceX is developing with the Big Falcon rocket and spaceship, which Musk has previously outlined at length during international aerospace meetings in 2016 and 2017. Discussion topics will focus on how best to support hundreds of humans living on Mars, such as accessing natural resources there that will lead to a sustainable outpost.

Related: SpaceX to Begin BFR Production at the Port of Los Angeles
City Council Approves SpaceX's BFR Facility at the Port of Los Angeles
This Week in Space Pessimism: SLS, Mars, and Lunar Gateway


Original Submission

Related Stories

SpaceX to Begin BFR Production at the Port of Los Angeles 17 comments

The Mayor of Los Angeles has announced that SpaceX will begin production of the BFR at the port of Los Angeles:

SpaceX can start building its "Big Fucking Rocket," now that it has officially found a home in LA. Mayor Eric Garcetti has announced on Twitter that the private space giant "will start production development of the Big Falcon Rocket (the spacecraft's tamer name, apparently)" at the port of Los Angeles. SpaceX designed the 348-foot-long behemoth to fly humanity to the moon, Mars and beyond. It will be able to carry up to [150] tons in payload, whereas Falcon Heavy can only carry [63.8] tons. "This vehicle holds the promise of taking humanity deeper into the cosmos than ever before," he added, along with an illustration of the company's massive interplanetary spacecraft.

The massive cylindrical body of the BFR's fabrication mold has been photographed at a tent at the Port of San Pedro (compare to this earlier photo of the main body tool):

Finally, it's worth noting just how shockingly busy the BFR tent was on both April 13th and 14th, as well as the 8th (the first day Pauline visited the facility). With upwards of 40 cars parked at the tent, it's blindingly clear that SpaceX is not simply using the tent as a temporary storage location – alongside the arrival of composite fabrication materials (prepreg sheets, epoxy, etc) from Airtech International, SpaceX undeniably intends to begin initial fabrication of the first BFR prototypes in this tent, although they will likely eventually move the activities to the Berth 240 Mars rocket factory. That's certainly not a sentence I ever expected to write, but it is what it is.

The BFR's height may be elongated from its planned total of 106 meters.

Related: SpaceX to Launch Five Times in April, Test BFR by 2019
SpaceX BFR vs. ULA Vulcan Showdown in the 2020s
SpaceX Valued at $25 Billion... and More


Original Submission

City Council Approves SpaceX's BFR Facility at the Port of Los Angeles 10 comments

All systems are go for SpaceX's BFR rocket facility at Port of Los Angeles after City Council OKs plan

The Los Angeles City Council on Tuesday approved a plan allowing SpaceX to build and operate a facility at the Port of L.A., where the Hawthorne space company will produce its next-generation BFR rockets and spacecraft.

The vote gives formal approval to a plan that got the greenlight last month from the L.A. Board of Harbor Commissioners.

During a presentation to the council, L.A. City Councilman Joe Buscaino said the project could result in up to 700 new jobs.

Under the terms of the deal, SpaceX will have an initial 10-year lease with two additional 10-year extension options. The company's initial rent will be $1.38 million a year, with annual adjustments based on the Consumer Price Index, but it can offset a total of $44.1 million in rent by making improvements to the Terminal Island site at Berth 240 in its first 20 years of tenancy.

Previously: SpaceX to Begin BFR Production at the Port of Los Angeles

Related: SpaceX to Launch Five Times in April, Test BFR by 2019
SpaceX Valued at $25 Billion... and More


Original Submission

This Week in Space Pessimism: SLS, Mars, and Lunar Gateway 25 comments

NASA's Space Launch System: Rocketing Towards Cancellation?

The National Space Society recently held a conference in Los Angeles, and SLS was apparently a hot topic at the gathering. Over the course of four days of mingling with space industry muckety-mucks, Politico Space reports it heard multiple rumblings that bode ill for the Space Launch System money-pot.

For one thing, SLS has been marketed as key to NASA's efforts to eventually put astronauts on Mars. But as Politico reports, attendees at the conference expressed doubts as to "the wisdom or efficacy of a crewed mission to Mars in the next decade." California Republican and House space subcommittee member Rep. Dana Rohrabacher, for one, criticized the technology as too immature to support a manned Mars mission, saying "I think all this talk about going to Mars has been premature," and warning that NASA won't actually be ready to conduct a manned Mars mission before "20 years from now, maybe more."

Astronaut Chris Hadfield says the rockets from NASA, SpaceX, and Blue Origin won't take people to Mars

[Chris] Hadfield, who's now retired, shares his expertise about rockets, spaceships, spacewalking, and Mars exploration in a new web course on the online platform MasterClass. To follow up on those lessons, we asked Hadfield what he thinks about the future rocket ships of three major players in the new space race: NASA's Space Launch System, SpaceX's Big Falcon Rocket, and Blue Origin's New Glenn rocket.

[...] "Personally, I don't think any of those three rockets is taking people to Mars," Hadfield told Business Insider. " I don't think those are a practical way to send people to Mars because they're dangerous and it takes too long."

Response to Hadfield's remarks: SpaceX BFR can be used for massive space development, orbital, lunar and Mars colonization

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  • (Score: 3, Touché) by DannyB on Wednesday August 08 2018, @08:56PM (40 children)

    by DannyB (5839) Subscriber Badge on Wednesday August 08 2018, @08:56PM (#718991) Journal

    First I suppose people will be concerned with the bottom two layers of Maslow's hierarchy of needs.

    Then people will do what they already do on Earth.
    * Twitter
    * Facebook
    * Kardashians
    * American Idol
    Etc

    Will Mars be populated mostly be Smart people, or mostly by Rich and Powerful people?

    --
    People today are educated enough to repeat what they are taught but not to question what they are taught.
    • (Score: 3, Interesting) by HiThere on Wednesday August 08 2018, @09:35PM (8 children)

      by HiThere (866) Subscriber Badge on Wednesday August 08 2018, @09:35PM (#719028) Journal

      WRT your question:
      NO.

      The people who go to Mars will be smarter than average, but, on the average, not overwhelmingly so. Their trips will be paid for by someone else. And they won't have much internet access...except possibly to local nodes.

      I expect that the jobs will be mainly mining, construction, and research...with most not being research, which is why I said not overwhelmingly more intelligent. They had better send a balanced male-female ration if they want to avoid severe problems...but getting the women is problematical. (This is normal for a frontier, and often causes severe problems, but this place is going to be a lot more organized and a lot closer to the edge than Dodge City was.)

      What they really need to do is get the bugs out of virtual reality, so that people will be able to live virtual lives that relieve the pressures of their normal lives. The material society is going to need to be rather tightly controlled and supervised, to prevent one disaffected individual from killing everyone, but people get rather unhappy if that's what their whole life is like.

      --
      Javascript is what you use to allow unknown third parties to run software you have no idea about on your computer.
      • (Score: 4, Insightful) by legont on Thursday August 09 2018, @12:33AM

        by legont (4179) on Thursday August 09 2018, @12:33AM (#719141)

        They had better send a balanced male-female ration if they want to avoid severe problems...but getting the women is problematical.

        Why don't they send men who are happier with each other?

        --
        "Wealth is the relentless enemy of understanding" - John Kenneth Galbraith.
      • (Score: 2) by takyon on Thursday August 09 2018, @02:32AM

        by takyon (881) <reversethis-{gro ... s} {ta} {noykat}> on Thursday August 09 2018, @02:32AM (#719194) Journal

        There's a case to send only women on the initial manned science missions to Mars. Women typically weigh less and require less calories, meaning less mass on the spaceship.

        For a colonization effort, you could continue to send mostly women, with cold storage semen for insemination. Or you could just use artificial wombs and related technologies, which I imagine will be available by the time any serious colonization effort could be mounted. Best case scenario, you don't even need to send frozen sperm/eggs, just transmit digitized genomes.

        Bad personalities can be screened out to an extent when applicants are chosen. Since we won't be sending millions of people there anytime soon, and they can just reproduce when they get there, you can afford to be choosy. To help avoid one crazy killing everybody, you could build multiple separate habitats/buildings and other redundancies. For example, make it so that if one room gets punctured, others seal off automatically.

        Of course, all long-term manned science or colonization efforts ought to be leaning heavily on robots.

        Every technology needed for good VR (headsets, panels, GPUs, storage) will greatly advance during this time frame. Even the most optimistic mission date, SpaceX's 2024-2026 missions, gives a massive 6-8 years of improvement (Oculus was founded in 2012, Rift consumer version released in 2016). NASA wants a manned Mars mission by around 2035 but the details have not been worked out and it could be delayed until the 2040s if SpaceX doesn't propose "use our BFR". I wouldn't expect any serious colonization before 2050. That's over 30 years, enough time to switch to 3D CPU/GPUs, have neuromorphic chips powering AI NPCs, and maybe a post-post-NAND memory or holographic storage, good for carrying a decent copy of the Internet to Mars (and also providing more detail for the VR).

        --
        [SIG] 10/28/2017: Soylent Upgrade v14 [soylentnews.org]
      • (Score: 2) by Immerman on Thursday August 09 2018, @03:41PM (4 children)

        by Immerman (3985) on Thursday August 09 2018, @03:41PM (#719424)

        Why would you expect not much internet access? Sending data to Mars is a LOT cheaper than sending anything else. Obviously they wouldn't be browsing on the original servers on Earth - that 6-to-44 minute round-trip lag time would get obnoxious fast. However, local caches of popular sites would be relatively easy to maintain, and who cares if they're hours out of date? Of course personalized and interactive sites like Facebook, SoylentNews, etc. would be more problematic since they can't be effectively cached as-is, those sorts of sites would likely need to operate local servers on Mars.

        We'd need to actually establish high-bandwidth data-links to Mars, along with at least one L4/L5 relay station for the times when the sun is between the planets, but we have the basic technology, and several terabytes of caching would be energy-cheap, and adequate for an outpost.

        • (Score: 2) by HiThere on Thursday August 09 2018, @05:26PM (2 children)

          by HiThere (866) Subscriber Badge on Thursday August 09 2018, @05:26PM (#719481) Journal

          Sending data is, indeed, cheaper. But the lag is bad enough to make the web impossible. Even the other parts of the net would have problems, but just imagine using this web page with 8 minutes (minimum) between each click or keystroke and the response.

          --
          Javascript is what you use to allow unknown third parties to run software you have no idea about on your computer.
          • (Score: 2) by Immerman on Friday August 10 2018, @03:49AM (1 child)

            by Immerman (3985) on Friday August 10 2018, @03:49AM (#719774)

            Read my comment again. More carefully this time.

            • (Score: 2) by HiThere on Friday August 10 2018, @05:39PM

              by HiThere (866) Subscriber Badge on Friday August 10 2018, @05:39PM (#719995) Journal

              OK. Point. Now read my GGGP comment. Your cache is hosted on the local nodes I was talking about.

              --
              Javascript is what you use to allow unknown third parties to run software you have no idea about on your computer.
        • (Score: 2) by DannyB on Friday August 10 2018, @01:56PM

          by DannyB (5839) Subscriber Badge on Friday August 10 2018, @01:56PM (#719905) Journal

          Sending data to Mars is a LOT cheaper than sending anything else.

          Ha ha ha ha!

          I beg to diff.

          AT&T says otherwise. They will charge by the killogram multiplied by the mile. Data rate will be strictly limited to some arbitrary killograms per second.

          --
          People today are educated enough to repeat what they are taught but not to question what they are taught.
      • (Score: 2) by DannyB on Friday August 10 2018, @01:54PM

        by DannyB (5839) Subscriber Badge on Friday August 10 2018, @01:54PM (#719904) Journal

        I expect that the jobs will be mainly mining, construction, and research...with most not being research,

        The jobs will mainly things such as assembling iPhones.

        On Mars Apple and FoxConn would not have to worry about maintaining the high standard of working conditions that it does on Earth. Inspections would be rare to never. The lawyers advise that human rights don't apply to steenkin' martians.

        The material society is going to need to be rather tightly controlled and supervised, to prevent one disaffected individual from killing everyone, but people get rather unhappy if that's what their whole life is like.

        It's not materialism or things that will make people happy. Religion is the only way to heal a world deeply and violently divided by Religion.

        They had better send a balanced male-female ration

        That is the completely wrongful approach. There is a wise old saying about segregating the sexes by planet. Why did it name one of the planets that is inhospitable and unlikely to ever be adaptable for life?

        --
        People today are educated enough to repeat what they are taught but not to question what they are taught.
    • (Score: 1, Interesting) by Anonymous Coward on Wednesday August 08 2018, @09:36PM (28 children)

      by Anonymous Coward on Wednesday August 08 2018, @09:36PM (#719030)

      The rich won't fly to Mars any time soon. The rich are living well here. Mars means:

      • genetic damage on the way there and on surface
      • hard labor to construct safe living areas and to maintain them
      • always a few hours from death if essential equipment fails and there are no spares
      • no way to produce anything locally, as it demands already developed industry (on Earth it took thousands of years of spiral development with free water, oxygen, nitrogen)
      • as there are no roads nor airplanes, help is weeks away if it comes from another outpost
      • ... if it comes from Earth, forget it.
      • substandard living conditions, illnesses, minimal healthcare, short life
      • no purpose in being there, except being there (as if Earth cares)
      • no way to spend money, other than on imported booze
      • one day the drunken mechanic at the reactor decides to end it all

      Conquest of planets us possible, but not today. Make robots first that can be sent to Mars and construct everything for humans. Make sure that flying vehicles for Mars are ready. Today settlement of Mars is premature and pointless, as there is nothing for humans to do there.

      • (Score: 2) by Weasley on Wednesday August 08 2018, @09:55PM (4 children)

        by Weasley (6421) on Wednesday August 08 2018, @09:55PM (#719050)

        Today settlement of Mars is premature and pointless, as there is nothing for humans to do there.

        How about expanding the territory of whatever nation pays for the trip? You can't very well claim a territory if you have no presence on it. A colony is a legitimate claim.

        • (Score: 1) by tftp on Thursday August 09 2018, @01:06AM (3 children)

          by tftp (806) on Thursday August 09 2018, @01:06AM (#719164) Homepage

          Currently illegal, see the Outer space treaty [wikipedia.org]:

          Article II of the Treaty states that "outer space, including the Moon and other celestial bodies, is not subject to national appropriation by claim of sovereignty, by means of use or occupation, or by any other means".

          • (Score: 2) by Runaway1956 on Thursday August 09 2018, @02:29AM

            by Runaway1956 (2926) Subscriber Badge on Thursday August 09 2018, @02:29AM (#719191) Journal

            We'll see how long some "law" proclaimed by ideologues lasts in practice. It's meaningless. Which court on earth even has jurisdiction on Mars? If a bunch of people arrive on Mars, and proclaim that they have established the New Mayan Empire, wtf is anyone on earth going to do about it? New Rome? New Beijing? Depending on the name used, various actors on earth will take meaningless stances praising or condemning the establishment of the colony - and nothing will happen.

            Given time, those various actors will attempt to establish their own colonies, in hopes of challenging that first colony.

          • (Score: 2, Informative) by khallow on Thursday August 09 2018, @10:47AM

            by khallow (3766) Subscriber Badge on Thursday August 09 2018, @10:47AM (#719310) Journal
            Article XVI:

            Any State Party to the Treaty may give notice of its withdrawal from the Treaty one year after its entry into force by written notification to the Depositary Governments. Such withdrawal shall take effect one year from the date of receipt of this notification.

            Already figured out.

          • (Score: 2) by Weasley on Thursday August 09 2018, @02:32PM

            by Weasley (6421) on Thursday August 09 2018, @02:32PM (#719388)

            A roll of toilet paper that will last as long as nobody is actually using those celestial bodies.

      • (Score: 2) by c0lo on Wednesday August 08 2018, @11:10PM (17 children)

        by c0lo (156) Subscriber Badge on Wednesday August 08 2018, @11:10PM (#719097) Journal

        Everything you listed is right, but you forgot one essential factor in that list: the energy.

        No local oxygen and dinojuice, solar constant at half the Earth one, rarefied atmosphere won't push enough into wind turbines, no hydropower.
        The only way I can think to have that energy: send ahead portable nuke piles, whatever 'portable' and 'pile' would mean. Lotsa of them if you want to dig. Even more of them if you want to obtain oxygen locally. Add some more if you want to start smelting.

        --
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        • (Score: 1) by khallow on Thursday August 09 2018, @10:58AM (7 children)

          by khallow (3766) Subscriber Badge on Thursday August 09 2018, @10:58AM (#719311) Journal

          solar constant at half the Earth one

          So there is solar power at adequate levels. There's also geothermal.

          • (Score: 2) by c0lo on Thursday August 09 2018, @12:45PM (5 children)

            by c0lo (156) Subscriber Badge on Thursday August 09 2018, @12:45PM (#719341) Journal

            So there is solar power at adequate levels.

            Demonstrate the adequacy, will you?
            Consideration for self-sufficiency:
            - an average human under average physical workload needs 8700kJ equiv food per day when the oxygen is for free like on Earth.
            - the max photosynthetic efficiency light->food is about 3%. Grow it underground under artificial light (red and blue) and you maybe obtain 10% - and you will need to go underground, otherwise radiation and the loss of heat through the transparent panels gonna kill your crop.
            - a good solar panel has an efficiency of 25%, go 35% on concentrated. The weight of solar panel mounted in Earth conditions is between 10 and 20kg/sqm. Ok, take half of the minimum, 5kd/sqm
            - in a good day, you'll get about 5 hours equivalent full-Sum. At a solar constant of 560W/sqm.

            Based on the above, you should be able to compute the mass of the photovoltaics required for food-only self-sufficiency for one person. Feeling of guts, if you come under one tone of PVpanels/person you made a mistake somewhere.

            There's also geothermal.

            Ah, yes, how could I forgot about? You will only need to borrow some energy from the local bank and dig a borehole 2-3 kilometres down and install pipes and turbines, get a thermal transport fluid and all is set.
            But I'm sure the Martian Energy Bank has low fees and the loan rate are resonable. How much you reckon you'll need? In the high GWh or low TWh range?

            --
            https://www.youtube.com/watch?v=aoFiw2jMy-0 https://soylentnews.org/~MichaelDavidCrawford
            • (Score: 1) by khallow on Friday August 10 2018, @04:20AM (4 children)

              by khallow (3766) Subscriber Badge on Friday August 10 2018, @04:20AM (#719784) Journal

              Based on the above, you should be able to compute the mass of the photovoltaics required for food-only self-sufficiency for one person.

              Make the solar panels on Mars and you don't have to worry about the mass.

              • (Score: 2) by c0lo on Friday August 10 2018, @05:57AM (3 children)

                by c0lo (156) Subscriber Badge on Friday August 10 2018, @05:57AM (#719814) Journal

                Make the solar panels on Mars and you don't have to worry about the mass.

                That's cool.
                Except there's that nagging problem: the energy to make those photovoltaics and be still alive by the time you manage to have enough of them.

                --
                https://www.youtube.com/watch?v=aoFiw2jMy-0 https://soylentnews.org/~MichaelDavidCrawford
                • (Score: 1) by khallow on Friday August 10 2018, @11:53AM (2 children)

                  by khallow (3766) Subscriber Badge on Friday August 10 2018, @11:53AM (#719874) Journal

                  Except there's that nagging problem: the energy to make those photovoltaics and be still alive by the time you manage to have enough of them.

                  Use that nuclear plant or some starter solar panels from Earth to get it going. Nobody will just drop naked people on Mars and expect a civilization.

                  • (Score: 2) by c0lo on Friday August 10 2018, @12:20PM (1 child)

                    by c0lo (156) Subscriber Badge on Friday August 10 2018, @12:20PM (#719879) Journal

                    Use that nuclear plant or some starter solar panels from Earth to get it going. Nobody will just drop naked people on Mars and expect a civilization.

                    Remember where you inserted in the thread? At:

                    The only way I can think to have that energy: send ahead portable nuke piles, whatever 'portable' and 'pile' would mean. Lotsa of them if you want to dig. Even more of them if you want to obtain oxygen locally. Add some more if you want to start smelting.

                    My point: the kickstart is not gonna be cheap and not gonna happen over a short period of time. We may not be alive to witness the beginning of the first colony on Mars.

                    --
                    https://www.youtube.com/watch?v=aoFiw2jMy-0 https://soylentnews.org/~MichaelDavidCrawford
                    • (Score: 1) by khallow on Saturday August 11 2018, @02:59AM

                      by khallow (3766) Subscriber Badge on Saturday August 11 2018, @02:59AM (#720173) Journal
                      And that was ridiculous. Take this alternate scenario.

                      Send a few small nuclear power plants to Mars and build small automated factories that build solar cells. Shortly thereafter, you start building more such plants powered by the solar cells you just made. You didn't have to send more nuclear power plants from Earth past the starter ones. What was sent was sufficient to build local power generation and that in turn is enough to build more.

                      Now, it may be that fission power is out of reach for early development of Mars. In that case, we still have solar. It's not as mass efficient so the start would be likely more expensive and slower. But once you get to a certain point, it doesn't really matter if you started with nuclear or not.

                      My point: the kickstart is not gonna be cheap and not gonna happen over a short period of time. We may not be alive to witness the beginning of the first colony on Mars.

                      Unless, of course, it is. My view is that we aren't seeing attempts at Martian colonies now for non-technological reasons (such as a huge misdirection of our resources into centralized national space programs for the past 60 years and substantial regulatory and government obstructions of the past). We don't know how much faster such progress will happen now that much of these impediments have been removed and the cost of access to space is going down significantly. We may well see such colonization in our lifetimes.

          • (Score: 2) by HiThere on Thursday August 09 2018, @05:31PM

            by HiThere (866) Subscriber Badge on Thursday August 09 2018, @05:31PM (#719487) Journal

            Not sure about the adequacy for solar power. The average at the top of the atmosphere might be adequate, but dust storms can last for months.

            I'd prefer solar too, but it may not be a viable choice. And there's no flowing water to spread radioactive wastes, so even quite modest treatment should confine them to one locale.

            OTOH, most nuclear plants depend on water for cooling. That would need to be figured out. (It probably already has been, but I don't think radiative cooling would suffice.)

            --
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        • (Score: 2) by Immerman on Thursday August 09 2018, @03:53PM (8 children)

          by Immerman (3985) on Thursday August 09 2018, @03:53PM (#719435)

          Shade-loving plants.

          Anything that likes indirect sunlight on Earth should do just fine on Mars, and convert local water, CO2, and sunlight into air, food, and building materials. Ideally we'll find (or design) plants radiation-tolerant enough to survive in minimalist inflatable greenhouses - otherwise we'd need to build a protective layer of ice over them, or even move them (mostly) underground and redirect sunlight from the surface.

          For heavy construction though, yeah nuclear power would be immensely helpful. Conveniently though, multiple companies have already designed compact self-contained reactors for use here on Earth, and NASA has developed (or was it backed?) a 1-10kWe reactor specifically for low- and micro-G environments. Admittedly underpowered, but a dozen of those should be able to power a couple electric backhoes or a tunneling machine to speed up construction dramatically.

          And of course large area solar can be done extremely lightly and cheaply with the help of mylar solar concentrators and a little inflatable scaffolding.

          • (Score: 2) by HiThere on Thursday August 09 2018, @05:33PM (7 children)

            by HiThere (866) Subscriber Badge on Thursday August 09 2018, @05:33PM (#719490) Journal

            FWIW, lcd lights are efficient enough that even with normal earth sunlight available for piping people often opt to use lcd lighting in indoor green houses. See "urban farms". (I may not be convinced that they're competitive, but the technology is interesting.)

            --
            Javascript is what you use to allow unknown third parties to run software you have no idea about on your computer.
            • (Score: 2) by Immerman on Friday August 10 2018, @03:45AM (6 children)

              by Immerman (3985) on Friday August 10 2018, @03:45AM (#719773)

              Here on Earth we've got cheap fossil fuel energy to make that possible. On Mars, *if* you've got a lot of surplus nuclear power that's great - but if you assume power is at a premium it's a much less rosy picture. High-end commercial LEDs are pushing 81% efficiency. The most efficient commercial solar panels though are only reaching 22.5%. That's only ~18% efficiency sunlight-to-artificial-light, at a much higher cost than solar focusing (in price, shipping mass, and technical complexity and failure risk)

              • (Score: 2) by HiThere on Friday August 10 2018, @05:35PM (5 children)

                by HiThere (866) Subscriber Badge on Friday August 10 2018, @05:35PM (#719992) Journal

                But I don't think you can depend on sunlight on Mars, because of the incredible dust storms. The reduced insolation would probably mean that you couldn't depend on solar panels. What I'm worried about is cooling the nuclear plant, but some designs don't seem to be too bothered by that. True, the produce relatively small amounts of power, but that means that everything is going to need to be designed to use minimal power. And there had better be excess generation capacity in the form of multiple plants, so that when the power needs to be repaired you don't all die. So smaller plants are a real benefit, especially if they also require less maintenance.

                I'd really rather depend on solar power, but I think the dust storms will make that impossible...unless you store enough power to last for months. (I'm not sure how long. A recently observed dust storm lasted two weeks, but I see no reason to believe that was the longest. I'm also not sure how much that affects power generation at the surface, as there were multiple reasons to shut down Opportunity for the duration.)

                --
                Javascript is what you use to allow unknown third parties to run software you have no idea about on your computer.
                • (Score: 2) by Immerman on Saturday August 11 2018, @01:25AM (4 children)

                  by Immerman (3985) on Saturday August 11 2018, @01:25AM (#720147)

                  Yes, the worst dust storms can last many months, and block 90+% of insolation at their worst (I haven't been able to find info on how long "their worst" may be reasonably expected to last). That definitely means you need backup power options - but solar is viable most of the time, and is far lighter, cheaper, and safer than nuclear. I would imagine an outpost would want at least enough nuclear power capacity to keep things running in minimal survival mode, but a great deal of growth and other industry would be powered by solar.

                  The moon has related problems - though rather than dust storms it has night that last for two weeks out of every four. I would imagine the solution would be similar, with the exception that rather than erratic dust storms of unpredictable length, you'd have a regular two weeks on, two weeks off rhythm to more power-hungry endeavors.

                  Back on Mars, it would be worth investigating the distribution of dust storms as well - my impression is that they're mostly concentrated near the lower latitudes and become less frequent and intense near the poles - which is probably where you'd want to build your outpost anyway, to have access to the vast quantities of water frozen there. On a related note, I doubt cooling would be an issue - ambient temperatures average around -55C, and you've got plenty of water to use for heat transfer. An underground liquid-cooling loop should be quite capable of shedding waste heat, or you could use that heat more productively to melt ice directly (it takes roughly as much energy to melt ice without changing the temperature as it does to boil the resulting water). With such low ambient temperatures liquid water becomes a valuable construction material - with sufficient care you could make large domes of transparent radiation shielding, which could be easily vacuum-insulated from habitats or greenhouses within them.

                  • (Score: 2) by HiThere on Saturday August 11 2018, @05:27PM (3 children)

                    by HiThere (866) Subscriber Badge on Saturday August 11 2018, @05:27PM (#720330) Journal

                    I'm not at all sure that what you're proposing would work. The caps are largely dry ice, so the water may be very thinly spread. For cooling you don't just need a temperature difference, you need a way of distributing it. E.g. you can touch the outside of a working ceramic kiln without getting burned, because the kiln is a thermal insulator.

                    Now liquid water on the surface of Mars sublimes, and so does dry ice, what's left behind is probably not a good conductor of heat. Likely you'd need to depend on radiant cooling (slow!!) or drill down and circulate a working fluid through a long heat pipe. You could also use some of the "waste heat" to warm the living quarters, which would provide you with additional cooling surface, but not allow a very high temperature for the cooling, and, IIRC, radiant cooling is not only more efficient when hotter, but there's a 4-th power law involved, so you want your radiant surface to be as hot as feasible.

                    P.S.: On Earth the nuclear plants use flowing water to cool themselves. That's why they tend to be situated along the banks of rivers. I believe that there are some that use large "cooling ponds", which largely depend on evaporative cooling, i.e., losing a lot of the water. Not good for Mars.

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                    • (Score: 2) by Immerman on Sunday August 12 2018, @01:56AM (2 children)

                      by Immerman (3985) on Sunday August 12 2018, @01:56AM (#720416)

                      My understanding is the dry ice is mostly seasonal glaciers, with numerous more permanent water glaciers having been identified. Dry ice would work fine for cooling too though.

                      Sure, for cooling you need thermal transfer - ambient heating is a great use. and geothermal heat pipe would certainly work. My suggestion was to run it through a big "hot plate" on which you steadily pile crushed ice. And while sublimation consumes even more heat than melting, if you want to capture the water as a useful resource you probably want to perform the process inside a pressurized chamber. Fortunately you can get away with a CO2 atmosphere, so you need only pressurize ambient air. Radiant is also an option, I believe that's what the NASA reactors use - but they're only dealing with a few kW, and if you're trying to establish a colony rather than just a research outpost you probably want to work closer to the MW range.

                      As for the difference in scale between rivers and crushed ice - there's also a difference in reactor scale - reactors on Earth typically operate in the GW scale, which would definitely present some unique cooling challenges on Mars.

                      If you were particularly clever, and managed to find fairly pure water ice glaciers, you could potentially even use the waste heat for tunneling: Dig an initial cave and airlock (to maintain a reasonable working pressure) into the side of a glacier, then use waste heat to generate steam that you blow against whatever walls you want to excavate. As steam melts the ice it cools, condensing if you balance flow rates just right, and you can then recapture condensed steam along with the melt-water. With a little luck, cooler steam that flows into cracks in the ice would freeze before reaching the surface, gradually "repairing" the glacier into a more airtight structure for future use.

                      • (Score: 2) by HiThere on Sunday August 12 2018, @05:44PM (1 child)

                        by HiThere (866) Subscriber Badge on Sunday August 12 2018, @05:44PM (#720631) Journal

                        Well, if you kept things in an enclosed chamber, that would produce a larger radiation surface, so cooling would be more effective at lower temperatures...but "continually packing on ice" doesn't sound to me like a feasible strategy. And how large would your cooling chamber need to be to allow sufficient heat to dissipate? I know we're talking about smaller reactors, but it doesn't sound workable. If you make the chamber long and thin to allow enhanced cooling, you're heading in the direction of a heat pipe, but I think that requires an internal circulation mechanism to work, which means it *is* a heat pipe. Horizontal is cheaper to build than vertical, which involves digging (drilling!) a pit to put the pipe in, but vertical pipe have more direct connection with conductive surfaces (i.e., base rock). A glacier would work until it evaporated, but that would happen pretty quickly to any ice in contact with the cooling element. And vertical or at a steep angle is probably easier to drill than a shallow angle. If you've got spare water, you dump it in the hole and seal the top (with provision to add more water as needed). That provides a better thermal contact between the pipe and the base rock. This will be a problem if there isn't a lot of subsurface water.

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                        • (Score: 2) by Immerman on Sunday August 12 2018, @08:15PM

                          by Immerman (3985) on Sunday August 12 2018, @08:15PM (#720671)

                          Well, if you assume you want lots of water for growing food and making methane for rocket fuel and energy storage you'll need to be melting it all anyway.

                          Easy enough to see how feasible it is - the heat of fusion for water is 334J/g - if we completely ignore all heating, and assume 100% of the energy goes to melting ice at 0C to water at 0C, and assume a smallish, but still impressive 1MW (waste heat) reactor, then we'd need to supply 1MW *1g/334J = ~3kg/s of ice to melt to dissipate the 1MW of heat. That doesn't sound too ridiculous. at first glance. Of course it does add up - 3kg/s =~ 11,000 kg/hour, which sounds considerably more extreme - but at 0.934g/cm^3 that only translates to 11 cubic meters. Still pretty impressive for an hour of mining - but if you could perform "steam mining" that could just mean you're creating new ice-habitats very quickly, though that probably wouldn't be sustainable for more than a few... months? years?

                          Still, it could consume quite a bit of energy relatively quickly - especially if you figure you're heating the ice/water as well - Ice has a specific heat of ~2J/gK, and water of ~4J/gK, so if you heated ice at -55C into water at 100C you'd consume an additional ~500J/g. And if you boiled the resulting 100C water without heating it any further (which could be quite handy for distillation), that'd add water's whopping 2230J/g heat of vaporization. Combined, that'd total about 3,000J/g, reducing the necessary ice input to only a bit over 1 cubic meter per hour to dissipate 1MW of heat. That sounds pretty feasible to me.

      • (Score: 2) by takyon on Wednesday August 08 2018, @11:25PM (3 children)

        by takyon (881) <reversethis-{gro ... s} {ta} {noykat}> on Wednesday August 08 2018, @11:25PM (#719101) Journal

        no way to produce anything locally, as it demands already developed industry (on Earth it took thousands of years of spiral development with free water, oxygen, nitrogen)

        This is the big one. If they can figure out how to grow plants, as has been done on the ISS but at a larger scale, then they could try to feed themselves, and use organic byproducts to create some chemicals, medicine, bioplastics, etc.

        But by "they" I mean 5-10 Earth scientists and not a colony of rich people.

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        • (Score: 0) by Anonymous Coward on Thursday August 09 2018, @01:18AM

          by Anonymous Coward on Thursday August 09 2018, @01:18AM (#719171)

          I'd agree if those 5-10 people have a thousand intelligent, fusion-powered positronic robots with them. Then indeed they could sit quietly in a safe room and issue orders to dig here and to smelt there. But today's martian plans are not like that, and we have no smart robots. They can't even take dumb robots with them because they have no fusion, and lifting a fission plant to Mars is a tough job even for extraterrestrials (a million tons of stuff.)

          By all indications, if Musk can convince the powers that be, it will be a most dangerous trip of five men in bulky spacesuits. They will spend ten days there and return. Why ten days? Because that's how much oxygen, water, food they can take with them to the surface.

        • (Score: 1) by khallow on Thursday August 09 2018, @11:40AM (1 child)

          by khallow (3766) Subscriber Badge on Thursday August 09 2018, @11:40AM (#719317) Journal

          If they can figure out how to grow plants, as has been done on the ISS but at a larger scale, then they could try to feed themselves, and use organic byproducts to create some chemicals, medicine, bioplastics, etc.

          I think even a colony of rich people can look at Earth (which grows all kinds of plants at all kinds of scales) and figure out how to grow plants.

      • (Score: 1) by khallow on Thursday August 09 2018, @11:03AM

        by khallow (3766) Subscriber Badge on Thursday August 09 2018, @11:03AM (#719312) Journal

        no way to produce anything locally, as it demands already developed industry (on Earth it took thousands of years of spiral development with free water, oxygen, nitrogen)

        We already figured out how to do that on Earth. It would just require transporting a modest amount of starting equipment to Mars to develop industry on Mars.

    • (Score: 2) by requerdanos on Wednesday August 08 2018, @11:46PM (1 child)

      by requerdanos (5997) Subscriber Badge on Wednesday August 08 2018, @11:46PM (#719113) Journal

      Maslow's hierarchy of needs.

      I know you are sort of tongue-in-cheek here, but really if I had an opportunity to move to Mars, I would personally take time to consider the Internet bandwidth and latency much more carefully than I would the situation for staying alive and being safe.

      I would just assume, you know, food, air, shelter. But so far as I know, the protocols to apt-get update && apt-get upgrade over a laggy high-latency network, even a fast one, are not very well developed.

      • (Score: 1) by khallow on Thursday August 09 2018, @11:09AM

        by khallow (3766) Subscriber Badge on Thursday August 09 2018, @11:09AM (#719313) Journal

        But so far as I know, the protocols to apt-get update && apt-get upgrade over a laggy high-latency network, even a fast one, are not very well developed.

        Let me fix that for you:

        1) apt-get update to a local machine on a periodic basis. This one machine deals with the grief of the laggy, high-latency network.

        2) Everyone else downloads from the local machine.

        3) Problem solved.

  • (Score: 0) by Anonymous Coward on Wednesday August 08 2018, @08:58PM (10 children)

    by Anonymous Coward on Wednesday August 08 2018, @08:58PM (#718995)

    They will pass their time by mining. I hear they're going to setup a Mars Cryptocurrency and mine their little hearts out.

    • (Score: 3, Funny) by takyon on Wednesday August 08 2018, @09:05PM (8 children)

      by takyon (881) <reversethis-{gro ... s} {ta} {noykat}> on Wednesday August 08 2018, @09:05PM (#719001) Journal

      Maybe we can heat the Red Planet up from its average −63°C. By cryptocurrency mining.

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      • (Score: 2) by DannyB on Wednesday August 08 2018, @09:11PM (7 children)

        by DannyB (5839) Subscriber Badge on Wednesday August 08 2018, @09:11PM (#719011) Journal

        There must be a way to power the cryptocurrency mining computers which generate that much heat. It would be more efficient to simply use that power to do the heating and do away with cryptocurrency which is an astonishing waste of energy and resources on Earth. The power of GPUs should be put to more productive uses which better humanity . . . like video games, and 3d graphics on TPS reports.

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        • (Score: 2) by takyon on Wednesday August 08 2018, @09:43PM (2 children)

          by takyon (881) <reversethis-{gro ... s} {ta} {noykat}> on Wednesday August 08 2018, @09:43PM (#719036) Journal

          Or 3d graphics for VR, so Mars colonists can pretend they're not stuck in a tin can or igloo [nasa.gov] on Mars.

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          • (Score: 0) by Anonymous Coward on Thursday August 09 2018, @02:26AM

            by Anonymous Coward on Thursday August 09 2018, @02:26AM (#719190)
            Maybe it's cheaper to play games on Earth? They can even be shown a "martian" landscape...
          • (Score: 2) by DannyB on Friday August 10 2018, @01:59PM

            by DannyB (5839) Subscriber Badge on Friday August 10 2018, @01:59PM (#719907) Journal

            Cheaper: implanted memories from Rekall.

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        • (Score: 2) by c0lo on Thursday August 09 2018, @12:29AM (1 child)

          by c0lo (156) Subscriber Badge on Thursday August 09 2018, @12:29AM (#719137) Journal

          It would be more efficient to simply use that power to do the heating and do away with cryptocurrency which is an astonishing waste of energy and resources on Earth

          Energy to heat efficiency? No need to worry, the energy trapped into storing a new bitcoin is abismally low vs the energy required to perform the computation.**
          Power efficiency? Yes, there are ways to transform that energy into heat faster, but as you don't need to rely exclusively on GPU to cook your meal...

          ** See also Landauer's principle [wikipedia.org]. Yes, it establishes a minimum for the energy required to maintain a bit, not the superior limit. It's interesting anyway.

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          • (Score: 2) by DannyB on Friday August 10 2018, @02:06PM

            by DannyB (5839) Subscriber Badge on Friday August 10 2018, @02:06PM (#719911) Journal

            Due to the conservation of energy, the energy trapped in bitcoin is never lost. In a million years people will be drilling into mars to mine the fossiled bitcoin for its stored energy.

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        • (Score: 0) by Anonymous Coward on Thursday August 09 2018, @12:50AM

          by Anonymous Coward on Thursday August 09 2018, @12:50AM (#719155)

          Whenever I hear this its from people who have no idea how much energy is used for various things, oh and they just dont like people using energy for stuff they dont like.

        • (Score: 1) by khallow on Thursday August 09 2018, @11:21AM

          by khallow (3766) Subscriber Badge on Thursday August 09 2018, @11:21AM (#719314) Journal

          It would be more efficient to simply use that power to do the heating and do away with cryptocurrency which is an astonishing waste of energy and resources on Earth.

          Why would we want to do that? Energy and resources are damn cheap. Maybe you ought to stop breathing to preserve the oxygen in the air.

    • (Score: 2) by c0lo on Thursday August 09 2018, @12:32AM

      by c0lo (156) Subscriber Badge on Thursday August 09 2018, @12:32AM (#719140) Journal

      They will pass their time by mining.

      Using shovels or what?

      My point: what is the source and amount of energy/power you assume they will have available?

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  • (Score: 4, Funny) by MichaelDavidCrawford on Wednesday August 08 2018, @09:19PM (4 children)

    by MichaelDavidCrawford (2339) Subscriber Badge <mdcrawford@gmail.com> on Wednesday August 08 2018, @09:19PM (#719015) Homepage Journal

    Stream very low-rez very low-framerate pr0n over the Deep Space Network.

    --
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    • (Score: 3, Interesting) by Anonymous Coward on Wednesday August 08 2018, @10:37PM (3 children)

      by Anonymous Coward on Wednesday August 08 2018, @10:37PM (#719079)

      I think MDC is on to something. Maybe some of the colonists will be porn actors (possibly only part time), and Mars porn will be sent back to Earth--where we can be astounded at the sexual antics possible in a low gravity field. For example, all kinds of aerial and carrying positions become easy for anyone of normal strength.

      This of course will attract more colonists...

      Porn always seems to lead in applications for new tech, why should Mars be different?

      • (Score: 2) by c0lo on Thursday August 09 2018, @12:39AM (2 children)

        by c0lo (156) Subscriber Badge on Thursday August 09 2018, @12:39AM (#719144) Journal

        Porn always seems to lead in applications for new tech, why should Mars be different?

        One possible reason: I hear the dust on Mars isn't as lubricating as one would hope. Even the toys' rubber will suffer because of it (and the radiation)

        (grin)

        --
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        • (Score: 1) by khallow on Thursday August 09 2018, @11:31AM (1 child)

          by khallow (3766) Subscriber Badge on Thursday August 09 2018, @11:31AM (#719315) Journal
          I heard the real problem is the near vacuum. You just can't have sex in near vacuum and stay alive for more than a minute or so.
          • (Score: 2) by c0lo on Thursday August 09 2018, @12:47PM

            by c0lo (156) Subscriber Badge on Thursday August 09 2018, @12:47PM (#719342) Journal

            You just can't have sex in near vacuum and stay alive for more than a minute or so.

            Never tried myself so I can't share the experience, but I hear the erotic asphyxiation is a thing.

            --
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  • (Score: 5, Informative) by MostCynical on Wednesday August 08 2018, @11:00PM (3 children)

    by MostCynical (2589) on Wednesday August 08 2018, @11:00PM (#719093) Journal

    Seems some media types are upset they weren't invited. That doesn't make it "secretive" or "hush hush".

    http://nasawatch.com/archives/2018/08/update-on-that.html [nasawatch.com]

    https://www.cnet.com/news/spacex-elon-musk-co-hosts-secretive-mars-conference/ [cnet.com]

    --
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    • (Score: 2) by takyon on Wednesday August 08 2018, @11:44PM (2 children)

      by takyon (881) <reversethis-{gro ... s} {ta} {noykat}> on Wednesday August 08 2018, @11:44PM (#719112) Journal

      "Secretive" != "Secret". I stand by my word choice.

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      • (Score: 0) by Anonymous Coward on Thursday August 09 2018, @12:41AM (1 child)

        by Anonymous Coward on Thursday August 09 2018, @12:41AM (#719147)

        Secretion, excretion, what's the difference anyway?

        • (Score: 2) by DannyB on Friday August 10 2018, @02:01PM

          by DannyB (5839) Subscriber Badge on Friday August 10 2018, @02:01PM (#719909) Journal

          Secretions are kept secret.

          Excretions are externally published.

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          People today are educated enough to repeat what they are taught but not to question what they are taught.
  • (Score: 2) by realDonaldTrump on Wednesday August 08 2018, @11:44PM

    by realDonaldTrump (6614) on Wednesday August 08 2018, @11:44PM (#719111) Homepage Journal

    We had a very productive meeting in Davos, Switzerland. Where we talked about going to Mars. Same thing these guys are talking about. Because these guys work for us. We pay them and they do whatever the hell we tell them to do!! #WEF18 [twitter.com]

  • (Score: 0) by Anonymous Coward on Thursday August 09 2018, @10:01AM (2 children)

    by Anonymous Coward on Thursday August 09 2018, @10:01AM (#719301)

    I wonder if it's possible to send down some big asteroids to increase its mass first.

    • (Score: 2) by DannyB on Friday August 10 2018, @02:05PM

      by DannyB (5839) Subscriber Badge on Friday August 10 2018, @02:05PM (#719910) Journal

      And increase its water. And move Mars on a trajectory toward Earth.

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    • (Score: 2) by Immerman on Sunday August 12 2018, @02:00AM

      by Immerman (3985) on Sunday August 12 2018, @02:00AM (#720421)

      Not appreciably - the entire asteroid belt is estimated to mass only about 4% as much as the moon, or around 0.5% of Mars. What you could do that way is add some atmosphere and surface water, along with a bit of heat.

      The only reason it's considered resource rich is that all the resources are right near the surface, rather than mostly being molten slag deep below a planet's surface.

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