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NASA Uncertain How To Proceed In Developing Deep Space Module (examiner.com)

MarkWhittington writes: One of the provisions of the new NASA spending bill, which provided a hefty $1.3 billion boost to the space agency's budget, is a mandate to build a prototype habitation module for deep space exploration by 2018. Space News suggested that NASA is uncertain how to proceed with this sudden largess. Quite some time has passed since the space agency has gotten more money than expected and been told to speed up the development of an item of hardware. Usually, the opposite happens, with accompanying delays and increases in overall costs.

77 of 120 comments (clear)

  1. So...no one was taking the Mars thing seriously? by xxxJonBoyxxx · · Score: 4, Insightful

    >> NASA Uncertain How To Proceed In Developing Deep Space Module

    So...all NESA's noise about preparing for a manned Mars mission was just a joke then?

  2. Step by step process by sinij · · Score: 1, Offtopic

    Step 1 - genetically engineer over-ambitious, amoral super humans
    Step 2 - have them take over the world for a while
    Step 3 - after world revolution overthrows these, freeze them and send them out to space
    Step 4 - ???
    Step 5 - Yell Khaaann!!

  3. Asteroid Apophis by l0n3s0m3phr34k · · Score: 2

    IMHO, this is why the push for NASA to develop these techs. One of the SLS 's primary missions is their Near-Earth Asteroid Scout mission; the conspiracy theorist in me says that NASA is doing risk-mitigation just in case Apophis hits the keyhole in 2029.

  4. Be careful what you wish for... by drooling-dog · · Score: 4, Insightful

    I've had the feeling more than once that NASA promotes a lot of ideas that they know are impractical in order to fire up their base of support, which is largely SF fans who can't or won't distinguish fantasy from reality. With an election coming up the strategy works brilliantly, and now they're handed a big pot of money to begin realizing their dreams. So they have to hire a battalion of scientists and engineers to work on growing crops on Mars, squeezing water out of rocks, mining asteroids for minerals, and all the rest. This should be interesting.

    1. Re:Be careful what you wish for... by Crowd+Computing · · Score: 1

      I've had the feeling more than once that NASA promotes a lot of ideas that they know are impractical in order to fire up their base of support, which is largely SF fans who can't or won't distinguish fantasy from reality. With an election coming up the strategy works brilliantly, and now they're handed a big pot of money to begin realizing their dreams. So they have to hire a battalion of scientists and engineers to work on growing crops on Mars, squeezing water out of rocks, mining asteroids for minerals, and all the rest. This should be interesting.

      You're overestimating the political clout of the space ex community. Since when was space ever a political issue? JFK "might" have turned the moon into a political issue, but he never ran on a reach for the stars platform. Sure there's some local politics involved, but it's more a question of Congressional pork for the states that host space launch facilities than of SF fans dreaming of moon bases.

    2. Re:Be careful what you wish for... by SuricouRaven · · Score: 3

      The SF fans can distinguish fantasy from reality. They just want to make their fantasy into reality by the transformative power of a giant pile of money.

    3. Re:Be careful what you wish for... by taiwanjohn · · Score: 1

      Except, in this case, it sounds like Congress just gave them the money without NASA requesting it. FTFA:

      Over the last several months, NASA has increasingly emphasized development of a habitation module that could be tested in cislunar space in the 2020s. That module could then be used for human missions to Mars that NASA hopes to carry out some time in the 2030s.

      I'm not the biggest space-geek in the world, but I do follow a couple of weekly podcasts, and both /r/space and /r/spacex on reddit, and this is the first news I've heard of this 'emphasis on development of a habitation module.' Of course they have the BEAM module going up next year, but that's been in the works for years already. In any case, I don't think this particular boost to NASA's budget was spurred by the sort of sci-fi fan uprising, whipped up by NASA propaganda as you describe.

      --
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    4. Re:Be careful what you wish for... by fahrbot-bot · · Score: 1

      ... fire up their base of support, which is largely SF fans who can't or won't distinguish fantasy from reality.

      Congress (and their states) must be filled with SF fans.

      --
      It must have been something you assimilated. . . .
    5. Re:Be careful what you wish for... by currently_awake · · Score: 1

      Congress is filled with people who want pork for their voters.

  5. Re:Duh! by kallen3 · · Score: 1

    naw, DS9 was built by the Cardassians and given to the Bajorans as part of a treaty and run by the Federation. Now Babylon5 is the way to go.

  6. Re:What's the problem? by Rei · · Score: 5, Insightful

    The model has worked poorly in what regard? SpaceX is actively delivering cargo to ISS for about 40% the per launch cost of ULA (without reuse) and has meet certification to deliver crew. A whole Dragon launch is going to cost NASA about as much as a single seat on Soyuz, and the whole COTS program, yielding two launch vehicles and two automated transfer vehicles cost about the same as a single Shuttle flight. The NASA final report on the program basically goes through every combination of phrases meaning "unqualified success" in the English language in describing the results of the program.

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    Shiny New Australia.
  7. Re:What's the problem? by Rei · · Score: 1

    Sorry, you mentioned CCDev, not COTS. But Commercial Crew is basically COTS phase II, in progress, and there's no reason to think that it's going to fare any worse than COTS.

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    Shiny New Australia.
  8. 4-year cycle will kill it by RubberDogBone · · Score: 4, Insightful

    It doesn't really matter what NASA has now. Space exploration requires projects that run 20 or 50 or even 100 years. Yes we have to reach that far if we really want to hit some big goals.

    But the 4-year election cycle means NASA's funding is threatened every time we elect a new round of idiots. Sometimes they are Pro-NASA but mostly they aren't, and cutting funding is what happens.

    You cannot explore space with a 20-year plan supported by fickle 4-year election cycles and 2-bit politicians.

    Other countries like China have no such issues. China can set a 50-year plan and proceed to start on it. NASA is stuck.

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    Sig for hire.
    1. Re:4-year cycle will kill it by rednip · · Score: 1

      4-year election cycles

      The federal government has a two year election cycle, if you knew that we'd likely have a more stable government.

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      The force that blew the Big Bang continues to accelerate.
    2. Re:4-year cycle will kill it by micahraleigh · · Score: 1

      What's your proposal?

      Allow the legislation that approves funding, but disallow other legislation?

      In other words, find a trans-democratic process to ham-fist the opinion of the experts down to the people who are funding it (i.e. tax payers and voters)?

    3. Re:4-year cycle will kill it by khallow · · Score: 1

      Other countries like China have no such issues. China can set a 50-year plan and proceed to start on it. NASA is stuck.

      I guess you haven't actually paid attention to China's space program. They suffer from the same illnesses.

    4. Re:4-year cycle will kill it by thinkwaitfast · · Score: 1

      What's your proposal?

      Break it down into achievable 4 year technology steps like when the US went to the moon. Another would be to hand the project off to the military which is what happened to Apollo early on when they demonstrated tat they didn't have the organizational competence to do the job.

    5. Re: 4-year cycle will kill it by thinkwaitfast · · Score: 1

      that part is not rocket science

      According to Richard Feynman that is the rocket science.

  9. Nobody is seriously planning to go to Mars soon by sjbe · · Score: 2

    So...all NESA's noise about preparing for a manned Mars mission was just a joke then?

    Probably not but I think the claims of getting there by the 2030s are absurdly unrealistic and certainly haven't been funded in a way that would make them feasible. It might be technologically possible but I don't see it being politically viable. I think NASA knows that it isn't politically viable so they aren't seriously planning for it. There certainly hasn't been serious funding on the level necessary to do a realistic manned Mars mission so why should NASA seriously plan for one? They are working on it but the Apollo program had double the funding NASA gets now (adjusted for inflation) and the Moon is a lot easier.

    1. Re:Nobody is seriously planning to go to Mars soon by Crowd+Computing · · Score: 1

      We're probably in a better state to reach Mars today than to reach the Moon in the 1960's. While rocket propulsion has been stuck in the Sputnik era, other technologies have seen considerable improvement, particularly in the accuracy of navigation, which is what matters the most after you've reached escape velocity. I think it's more a question of why not how. Why go to Mars? Barring a revolution in rocket technology that makes vacations in space cheap enough for the average millionaire, don't expect a mission to Mars until it becomes a political issue. The Martian will either be Elon Musk or the vanguard of the next space race.

    2. Re:Nobody is seriously planning to go to Mars soon by someone1234 · · Score: 1

      Bringing back some Mars rocks would be nice in my lifetime. Even in unmanned missions. Beginning of asteroid mining too.
      These are completely realistic goals.

      --
      Patents Drive Free Software as Hurricanes Drive Construction Industry
    3. Re:Nobody is seriously planning to go to Mars soon by Anonymous Coward · · Score: 1

      ...or space is simply a dead end, and there is no "Sputnik era", just simply the realistic era. All your "considerable" improvements didn't even bring back supersonic passenger transport right here on Earth where there's everyone and everything.

    4. Re:Nobody is seriously planning to go to Mars soon by rubycodez · · Score: 1

      eh, tremendous advances in rocket propulsion have been made! Hybrid rockets are one. geez, you're not into that topic at all are you?

    5. Re:Nobody is seriously planning to go to Mars soon by khallow · · Score: 1

      particularly in the accuracy of navigation, which is what matters the most after you've reached escape velocity

      As compared to staying alive for two years or more without resupply from Earth? Not a chance. Navigation in the 60s was adequate enough for a trip to Mars once you allow for course corrections.

    6. Re:Nobody is seriously planning to go to Mars soon by MachineShedFred · · Score: 1

      You have to remember that with Apollo, the starting point was basically a pad of paper. They had to build the boosters. They had to build the lander. They had to build the pressure suits. They had to figure out if long duration spaceflight was going to kill people. They had to build launch facilities. They had to build communications hardware and networks. They had to invent ways to navigate. They had to invent procedure lists and tests and simulations. They had to invent computing technologies and materials that were feasible for the job.

      Now we just need to build a bit of hardware and light the fuse. And everyone bitches about how it's too hard.

      Is Mars easy? Absolutely not. But we aren't starting from nothing - we have an absurdly huge lead on the starting position of the Gemini program.

      --
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    7. Re:Nobody is seriously planning to go to Mars soon by thinkwaitfast · · Score: 1

      The SSMEs are the best rocket motors that will ever be made.

    8. Re:Nobody is seriously planning to go to Mars soon by thinkwaitfast · · Score: 1

      They had to invent the science and engineering.

    9. Re:Nobody is seriously planning to go to Mars soon by Gavagai80 · · Score: 1

      While rocket propulsion has been stuck in the Sputnik era, other technologies have seen considerable improvement, particularly in the accuracy of navigation, which is what matters the most after you've reached escape velocity.

      Accuracy of navigation? The 1960s had no problem sending Mariner missions to Mars orbit, navigation has never been the issue. Landing instead of crashing has been the big problem for unmanned missions to Mars, and there are a whole host of problems for a potential manned mission.

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    10. Re:Nobody is seriously planning to go to Mars soon by Rei · · Score: 1

      Hardly. Just as an example, performance could be improved by use of a gelled hydrogen containing aluminum powder. Or significantly improved by aluminum-coated lithium powder (or liquid lithium injected as a triprop). Or dramatically improved by that plus FLOX as the oxidizer (although you probably wouldn't want to light that up until you got far enough up). And these are just examples of materials available today that we can use. FLOX/Li/H2 triprop is over 100 sec ISP better than LOX/H2. Not that big of a deal on first stages, but when you're talking half a dozen stages later like for a manned return from Mars....

      These are just examples of improvements from propellants, but improvements don't just stop at propellants - there are lots of potential improvements in each aspect of engine design that can be done. SSME was a great leap forward in terms of performance, but it's not the be-all end-all.

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      Shiny New Australia.
    11. Re:Nobody is seriously planning to go to Mars soon by Rei · · Score: 1

      Hybrid rockets are not new - they're actually very old (some of the early rocket research focused on things like peroxide/bitumen). The problem with them has always been thrust - since the oxidizer isn't integrated into the fuel like with solids, they're much more burn-rate limited. So you have to heavily core them out to make many channels to try to get thrust into something workable, but then you make them unstable and less predictable in burndown.

      That said, there is progress being made. The current research suggests that probably the best near-term way to go is LOX with an aluminized fuel of either paraffin wax or polyethylene. You want a hydrogen-rich hydrocarbon which is stable and relatively strong at room temperature but which melts into a very fluid liquid at relatively low temperatures above that and which can be readily blown into a spray of droplets. And like with solids, aluminum adds a lot of heat to the burn and stabilizes combustion against instabilities. Straight polyethylene alone has something like 3-4 times the burn rate of polybutadiene, and aluminum significantly increases it further.

      --
      Shiny New Australia.
    12. Re:Nobody is seriously planning to go to Mars soon by Rei · · Score: 1

      ... though my personal pet concept (which I'm actually working on an OpenFOAM simulation of right now) is a caseless rocket of a type that doesn't really have a name (although most closely resembles a hybrid). Like the above, it's LOX/Al/paraffin, but the aluminum is thin extruded honeycomb, aka structural. The aluminum is coated by paraffin (also extruded by the same extrusion head), and inside that, filling up each channel, a dense open cell polyurethane foam (optionally with a small amount of fused silica thickener) - also injected at the end of the extrusion head after the paraffin cools. The foam is designed to hold the (optionally thickened) LOX like a sponge, with enough pore space that it can still outgas. So the rocket can be stored and shipped empty (effectively zero fire risk), and then filled with LOX at the last minute before launch.

      During combustion, heat of combustion boils off the LOX and burns away the foam - this forms the deepest point of the burn inside each channel. The heat and swirling gases, like in a hybrid, melt the paraffin along the walls, forming a liquid pool and swirling it into droplets which burn in the LOX. The further down you get in the channel the more of the paraffin you've burned off (paraffin has a rather high specific heat and aluminum is a good conductor of heat and IR reflector, so you basically have the aluminum protected until the paraffin is gone). Beyond that you get to exposed aluminum, which quickly heats, erodes, softens, thins, and breaks into droplets which continue combusting out into the exhaust stream. Up until the very end, the aluminum provides containment allowing for high chamber pressure, furthered by the great strength of your propellant itself being an aluminum honeycomb. The droplets burning in the exhaust stream - and then later releasing latent heat of condensation - boost its temperature.

      Okay, so that's combustion, but we're kind of missing a key aspect: *a nozzle*. So we start with the throat: it turns out, you don't actually need a throat, a sort of "virtual throat" forms. This costs you some chamber pressure, but since the correlation between chamber pressure and ISP isn't that strong, it only costs you about 1,5% of your ISP - not a big deal. More of a big deal, however, is the expansion nozzle - as your exhaust stream will never move through the "throat"" (virtual or not) faster than its speed of sound. However, there are a variety of "virtual expansion nozzle" designs which don't actually require an outer containment structure. The most famous and efficient of these is the aerospike engine. The simplest is simply having a ring of thrusters around a relatively thruster-devoid center. There's a great deal of variety between these two. And the burning engine itself defines the shape (which can be fixed or changeable as it burns down). So the goal would be to find a design that maximizes performance while minimizing production complexity. For example, a simple straight annular shape would be easiest to extrude (the insides and outsides of the annulus would be extra thick to help resist the internal pressure and to take longer to burn away). With only a little more complexity you could have the annulus spiral and create a central vortex. With yet more complexity you could have exhaust jets angled somewhat in or out. With more complexity you could have non-linear exhaust channels and varying burn rates, even tracking along an aerospike shape if you really wanted. And on and on.

      Hence the need for a good CFD simulation.

      Hence what I'm working on. :) It's a bit tricky though because I can't just model it as frozen combustion - the aluminum in particular will continue to burn in the exhaust stream, and there's also potential for fuel-rich mixtures to get some additional bonus in-atmosphere from combustion with atmospheric oxygen in the bow shock. Where and how it burns does indeed matter quite a bit. And aluminum combustion isn't nearly as well categorized as hydrocarbon combustion. But the

      --
      Shiny New Australia.
    13. Re:Nobody is seriously planning to go to Mars soon by Rei · · Score: 1

      Let's not downplay it, a lot of things have gotten easier with space technology. We have more efficient engines, vastly smaller, faster computers, far superior communications equipment, far superior power generation and storage hardware, and a whole laundry list of things on pretty much every technology front.

      That said, the overall picture isn't "orders of magnitude better" today. It's indeed improved, but not by some vast margin, in the big picture. And unfortunately, Mars is a vastly more difficult mission target than the Moon.

      I'd call it about a draw.

      --
      Shiny New Australia.
    14. Re:Nobody is seriously planning to go to Mars soon by rubycodez · · Score: 1

      yes my whole point was the field of rocket propulsion is alive and not stagnant, with many issues and solutions in experiment

    15. Re:Nobody is seriously planning to go to Mars soon by thinkwaitfast · · Score: 1

      True, but the cost benefit is not there. You could also replace the oxygen with Fluorine. Not gonna happen.

    16. Re:Nobody is seriously planning to go to Mars soon by RockDoctor · · Score: 1

      other technologies have seen considerable improvement, particularly in the accuracy of navigation,

      in the first few hundred miles of the journey, yes. But beyond that, just how are you going to get your navigational fixes? GPS is, you'll remember, designed for people on the Surface of the Earth (SoE). It's probably extendible to (SoE)+/-10km ; ti might even extend to ten times that.

      By the time you're a million times outside that working range, there may well be problems. That's around 1/80 of the closest approach to Mars.

      Apollo used compasses - 3-d corrected compasses, using star angles not magnetic angles, but compasses nonetheless - and so, essentially dose Hubble. JWST will use compasses ("star finders", but still compasses), and I guess that the first generations of asteroid-dwellers will also use compasses. Until someone can afford to set 30-odd satellites into high-angle polar Solar orbits with perihelion well outside the asteroid belt ... I don't see them NOT using stellar compasses.

      --
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  10. Copy Skylab by jfdavis668 · · Score: 1

    Skylab was built from a Saturn V upper stage. Easy to put in orbit. Designed to be hooked up to other parts of a spacecraft. Quite sizable for the planned crew. Update the design with the technology we developed over the decades since then.

    1. Re:Copy Skylab by wiggles · · Score: 1

      Problem is, we're fresh out of Saturn V's with which to obtain the upper stages.

      No, we're going to need something new and inventive - perhaps an inflatable module of some sort. Something small enough to launch but big enough in space. Or perhaps something that can be assembled to give enough room in space while requiring multiple launches, akin to the ISS.

    2. Re:Copy Skylab by SuricouRaven · · Score: 2

      How about just extending the ISS lifetime? It's a modular station. It should be possible to make it operate for longer, even if it means building an entire new station bolted on the side and operating them in parallel until the old one can be decomissioned and deorbited. It'd still be cheaper than building a completely new station because you've already got long-term habitation and life support capability for construction, and can scavenge the old modules for usable parts to reduce the mass that must be launched. Use it as a testbed for testing longer-term life support technology that needs less frequent resupplying. By the time you've designed ISSv2 and operated it for a few years, you've already got half the design done for a Mars habitation module - the fundamental technologies are the same. Just need to stick on some more radiation shielding and a flare shelter. You can even use the ISS as a sort of 'space construction yard' to build your manned Mars ship, as it'll be far too big to go up in one launch and having a convenient manned orbital facility means you can send each new part up on an unmanned launcher rather than having to send astronauts to do the bolts and hook up the cables along with it. It would require some orbit adjustments, a bit higher up and perhaps less inclined, but that should be doable.

      The politics are a bit awkward though. Russia is happy to take their ISS modules and build their own station from them, but it's not clear to what extent they'll cooperate with NASA on any Mars ambitions. Given the current tendency of politics in that country they might decide that having their own all-Russian station would bring more prestige than cooperation on an extended international cooperative. They are still proud of MIR - and having a bigger, better MIR operating after the ISS is eventually decommissioned would firmly cement their claim to be the once again the most advanced nation in terms of space capability.

    3. Re:Copy Skylab by SuricouRaven · · Score: 5, Interesting

      A deep space module needs to be able to maintain a crew for years without resupply. That means bulky life support spaces - either a huge amount of food and oxygen storage or a farm module - along with enough spare parts to repair any and all possible faults that might occur. With the habitable parts wrapped up in heavy radiation shielding. You're not getting that up in one piece - it's going to have to be assembled in orbit using a modular design, probably involving a few habitation and life support modules connected up to non-habitable supply modules. Skylab is about the biggest you can launch in one piece, and it's far too small to go to deep space. A manned craft for deep space is going to look a lot like a smaller and more linear version of the ISS.

      The article talking about a 'habitation module' isn't helpful. Surviving for years without supplies doesn't need a module, it needs a whole complex of modules that fit and work together.

    4. Re:Copy Skylab by jfdavis668 · · Score: 1

      Don't read so literal. Copy the IDEA behind Skylab. The new Space Launch System also has upper stages.

    5. Re:Copy Skylab by plover · · Score: 2

      What about Hoberman spheres, or a similar self-unfolding structure? They could deploy clusters of them, perhaps skinned with mylar or other foldable materials.

      I still think the bigger problem is the lifetime of supplies needed. Everyone talks about recycling wastewater, but energy still has to be expended to crack the waste CO2 back into breathable oxygen. And then there's food. If they're in "deep" space, they're a long way from sunlight, so their plants are going to need energy from another source. And grow lamps don't last forever, not even LED lamps - 50,000 hours if they're lucky, which is only a half dozen years. Solar panels might last 25-30 years. They're going to need replacement power supplies, replacement computers, replacement everything. It's not like they can send them a supply ship - by the time the ship gets to where they were, they'll have moved on an additional 5 years or more.

      I think the only viable plan is to prove we can successfully colonize Mars first. Demonstrate the capability of landing and thriving on a non-living rock. Then we can talk about what kinds of modules we need for "deep" space.

      --
      John
    6. Re:Copy Skylab by Electricity+Likes+Me · · Score: 1

      Power is not a serious problem at Mars distances. For the cost and scale of a manned Mars mission, football-field sizes solar panels are perfectly affordable and practical for the spacecraft - also compact to launch (relatively) and deploy since they don't need to support their own weight against gravity like they do on Earth.

    7. Re:Copy Skylab by rubycodez · · Score: 1

      more importantly is something that can be spun to produce a 1-g force, bone loss in free fall is huge problem. A human would die after couple years with the 1 to 2 percent loss per month

    8. Re:Copy Skylab by Anonymous Coward · · Score: 1

      Or for the cost of development for SLS you could launch well over a hundred of Falcon Heavies, knock that down to a couple dozen topped with BA330's and you could easily have the largest structure put into orbit by humans for less money than was burnt on Constellation.

    9. Re:Copy Skylab by MachineShedFred · · Score: 1

      The reason why SkyLab worked is because they already had the hardware for planned Moon launches that were scrapped. So, because they didn't need an S-IVB to inject them into cislunar space, they could pump out the fuel / oxidizer of that nice cavernous structure and mount a bunch of stuff to the walls, and cut in a docking port on the end where the engine normally would be.

      Doing this with something that contains incredibly toxic rocket fuel at launch time is far more challenging, though it was postulated in a concept referred to as a "wet workshop" for a Venus flyby mission.

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    10. Re:Copy Skylab by thinkwaitfast · · Score: 1

      Where's the money in that compared with building something new?

    11. Re:Copy Skylab by painandgreed · · Score: 1

      How about just extending the ISS lifetime? It should be possible to make it operate for longer, even if it means building an entire new station bolted on the side and operating them in parallel until the old one can be decomissioned and deorbited.

      I suspect that due to design criteria and engineering realities, that may sound good but is something like trying to build a Ford truck out of a Chevy sedan by replacing broken bits over time via 3rd party parts (I was going to use turning a Mac into a PC by replacing parts, but felt a car allegory was needed). First off, they need to do a bunch of deep space testing, and the ISS isn't in deep space. I'm sure some of the initial testing and research can be done there, and probably already has been started if not done. However, eventually, we'll have to put something outside the radiation shielding of our planet and see how it works.

    12. Re:Copy Skylab by SuricouRaven · · Score: 1

      The ISS is in a rather awkward orbit. Well, awkward for everyone except Russia. Which is why it's so inclined.

    13. Re:Copy Skylab by dryeo · · Score: 1

      Do you really consider hydrogen and oxygen to be toxic? That's what fueled the Saturn V excepting the first stage which was kerosene+oxygen.

      --
      https://en.wikipedia.org/wiki/Inverted_totalitarianism
    14. Re:Copy Skylab by dryeo · · Score: 1

      It would be nice to study just how much gravity people actually need to stay fairly healthy. I'd guess we'd be OK on (actually slightly above) Venus where gravity is 90%. How about 75%, 50% or as on Mars, 33%? Easier to spin something up if you don't need the full 1-g, and it might not be worth staying on Mars if the low gravity is too hard on people.
      Right now we only have 2 data points, 0-g and 1-g with a couple of days at .16-g. Shame they never launched the ISS module with the centrifuge.

      --
      https://en.wikipedia.org/wiki/Inverted_totalitarianism
    15. Re:Copy Skylab by rubycodez · · Score: 1

      Even if Mars a problem, it may turn out that only a small time in a centrifuge (think certain carnival type ride) per day is all that is needed to stay healthy. But aren't such questions arguments for doing more on our manned missions. We could already have had the answer were a certain type of module added to ISS for example.

    16. Re:Copy Skylab by painandgreed · · Score: 1

      I think the only viable plan is to prove we can successfully colonize Mars first. Demonstrate the capability of landing and thriving on a non-living rock. Then we can talk about what kinds of modules we need for "deep" space.

      You're getting too far ahead. To even get to Mars, it's going to require a space ship that will require habitation on the scale of years independent and outside the magnetic shielding of Earth. This is what we're talking about here. These "deep space" modules are what will be needed to reach Mars and will be required first.

    17. Re:Copy Skylab by MachineShedFred · · Score: 1

      Well, unless you expose the thing to hard vacuum, it's essentially a bomb. And, you still have issues with hydrogen embrittlement of the metal it's made out of.

      Plus, we're not talking about a Saturn V, as we don't have any of those. We're talking about SLS, and using the LH / LOx motor in the upper stage is only "interim" right now, so they could go with something completely different.

      --
      Slashdot still doesnâ(TM)t support Unicode after it was added to the HTML standard in 1997.
    18. Re:Copy Skylab by dryeo · · Score: 1

      OK, I was misled by your reference to the "wet workshop" that was considered for the next batch of Saturn Vs that never came about. In that case they would have only have to have exposed the hydrogen tank to vacuum and I'd guess they considered hydrogen embrittlement.
      Given a big enough upper stage to use for living quarters, they'd have to use a non-toxic fuel

      --
      https://en.wikipedia.org/wiki/Inverted_totalitarianism
  11. Copy skylab to do what exactly? by sjbe · · Score: 1

    Skylab was built from a Saturn V upper stage.

    Which we no longer have and do not have any plans to build again. We could do something similar but first you have to answer the question of what you are trying to accomplish. We used that design because it was economical at the time. Doesn't necessarily mean it is a good idea today.

    Easy to put in orbit.

    Only true if you have a Saturn V rocket. We stopped making those 40 years ago. Yes we could do something similar if we build a Saturn V replacement but easy to orbit is merely one consideration.

    Quite sizable for the planned crew. Update the design with the technology we developed over the decades since then.

    And do what with it exactly? What does a Skylab copy get us? What problems are you solving that cannot be accomplish better in other ways? Is copying programs from the 1970s really the best way to move the space program forward?

    1. Re:Copy skylab to do what exactly? by jfdavis668 · · Score: 2

      Replace "Saturn V" with "Space Launch System." It gives you a large living space that is designed to be launched, hooked to and pushed around by other spacecraft.

  12. disgusting waste of taxpayer's money! by Thud457 · · Score: 3, Funny

    But... but.. but... NASA already gets like 25% of the Federal budget.
    And now Congress wants to give them Billions more while there are starving brown transgender children that need to be bombed?
    GET YOUR PRIORITIES STRAIGHT, AMERICA!

    --

    the preceding comment is my own and in no way reflects the opinion of the Joint Chiefs of Staff

    1. Re:disgusting waste of taxpayer's money! by fahrbot-bot · · Score: 4, Informative

      But... but.. but... NASA already gets like 25% of the Federal budget. And now Congress wants to give them Billions more while there are starving brown transgender children that need to be bombed? GET YOUR PRIORITIES STRAIGHT, AMERICA!

      For those unwilling to read the link (from 2007) provided by Thud457, I offer these excerpts:

      the average American thinks that NASA gets 1/4 of the U.S. total budget

      (the NASA allocation in 2007 was approximately 0.58% of the budget.)

      --
      It must have been something you assimilated. . . .
  13. Deep Space? Shielding is #1 problem by Big_Breaker · · Score: 3, Interesting

    Humans in deep space for any length of time will need serious shielding to avoid the health risks of ionizing radiation (gamma rays, etc). Traditional shielding is heavy and crowds out payload. Without a breakthrough in shielding manned space flight can't leave our planet's protection (the magnetosphere) for any length of time. No moon base - at least on the surface, no Mars missions, no Lagrange point space stations.

  14. That's too bad by fustakrakich · · Score: 1

    They could have kept all those shuttle tanks in orbit. They would make a perfect habitat.

    --
    “He’s not deformed, he’s just drunk!”
  15. Re:Deep Space? Shielding is #1 problem by frank249 · · Score: 4, Interesting

    As of 2012, NASA is undergoing research in superconducting magnetic architecture for potential active shielding applications. Active Shielding, that is, using magnets, high voltages, or artificial magnetospheres to slow down or defect radiation, has been considered to potentially combat radiation in a feasible way. So far, the cost of equipment, power and weight of active shielding equipment outweigh their benefits. For example, active radiation equipment would need a habitable volume size to house it, and magnetic and electrostatic configurations often are not homogenous in intensity, allowing high-energy particles to penetrate the magnetic and electric fields from low-intensity parts, like cusps in dipolar magnetic field of Earth.

    --

    Today's vices may be tomorrow's virtues.

  16. Fund NASA to do space science by wjcofkc · · Score: 1

    Fund industry to get them there.

    --
    Brought to you by Carl's Junior.
  17. No mission without existential crisis (probably) by sjbe · · Score: 1

    We're probably in a better state to reach Mars today than to reach the Moon in the 1960's.

    Technologically I would cautiously agree though there are some pretty substantial technical problems yet to be solved. Politically it's not even close. The US is realistically the only country right now that could seriously consider such a mission and those in power currently will never be willing to raise the taxes that would be necessary to fund such a mission.

    The Martian will either be Elon Musk or the vanguard of the next space race.

    Won't be Elon Musk I'm afraid unless he can amass a Scrooge McDuck sized fortune. Don't get me wrong, I think it's super cool that he is working hard on the problem but I don't think he'll be able to get the financing for the trip even if we can work out the technical details. There are good reasons to go to Mars but they aren't business reasons. Not yet anyway. The risk is huge, the cost is huge and the return on investment is impossible to determine.

    The only way I see us getting to Mars within the next 100 years is if we have an existential crisis (war, cold war, asteroid, etc...) or some minor miracle of a technological breakthrough. The only reason we went to the Moon was because of the Cold War with Russia.

  18. Re:What's the problem? by solartear · · Score: 1

    A Dragon launch is/will be about the NASA cost of 2 Soyuz seats, not 1. Though Soyuz seats are a lot cheaper for celebrities, similar to Dragon's cost, somehow.

  19. Re:No mission without existential crisis (probably by currently_awake · · Score: 2

    There are no technology barriers to a manned mission to Mars. All the barriers are political and financial. We can launch big stuff. We can make a life support system work for years. We can surround the crew compartment with enough water to keep radiation levels tolerable. We can make a lander, using big fuel tanks to land on rocket power instead of aerobraking. We can make a base on Mars to sustain humans for a couple of years. We can make radiation shielded EVA suits and exploration cars. We can land enough rocket parts and fuel to get back to orbit. We can return to Earth, and we can land from Earth orbit.

  20. Going to be a while by sjbe · · Score: 4, Interesting

    Bringing back some Mars rocks would be nice in my lifetime. Even in unmanned missions.

    An unmanned mission to bring back Mars rocks is probably doable. I'm dubious that we will send humans there in my remaining lifespan.

    Beginning of asteroid mining too.

    I think asteroid mining is a ridiculous concept. To be economically viable one of two things has to happen. Either 1) you have to bring the materials back to Earth to be refined and utilized or 2) you have to develop technology to refine and utilize them in space. If you choose option 1) you have to drop VERY large rocks onto the surface of the Earth. Do I have to explain that dropping large rocks onto Earth's surface is REALLY destructive? If you choose option 2) you have to replicate entire supply chains in space and we have ZERO technology in the pipeline to do that. We have no smelting or mining equipment that works in space on anything close to an industrial scale. We don't have the robotics. We don't have the control systems. Even if we did we have no power systems adequate to drive them on an industrial scale except maybe nuclear fission and that's pretty dicey even here on Earth.

    These are completely realistic goals.

    Depends on your timescale.

    1. Re:Going to be a while by painandgreed · · Score: 1

      I think asteroid mining is a ridiculous concept. To be economically viable one of two things has to happen. Either 1) you have to bring the materials back to Earth to be refined and utilized or 2) you have to develop technology to refine and utilize them in space. If you choose option 1) you have to drop VERY large rocks onto the surface of the Earth. Do I have to explain that dropping large rocks onto Earth's surface is REALLY destructive? If you choose option 2) you have to replicate entire supply chains in space and we have ZERO technology in the pipeline to do that. We have no smelting or mining equipment that works in space on anything close to an industrial scale. We don't have the robotics. We don't have the control systems. Even if we did we have no power systems adequate to drive them on an industrial scale except maybe nuclear fission and that's pretty dicey even here on Earth.

      It will probably be a combination of both. 2 will come first and yes, there is a great deal of work to do. Currently, they're still trying to just land a probe on an asteroid, let alone any attempt to survey it for mining later with as yet undeveloped tech. 1 will come after 2 and they'll just be dropping a few square meters of precious metals back to earth which won't really be any more dangerous than any other capsule re-eantry.

    2. Re:Going to be a while by Sir+Holo · · Score: 1

      Bringing back some Mars rocks would be nice in my lifetime. Even in unmanned missions.

      An unmanned mission to bring back Mars rocks is probably doable. I'm dubious that we will send humans there in my remaining lifespan.

      Aha! My friend, approximately 7% of all humans that have ever lived are alive today.

      Thus, if statistics doesn't lie –and we know that it can't –you and I have a 7% chance of being immortal.

      Prove me wrong!

  21. SLS to get useful payload, by solartear · · Score: 1

    and catches NASA unprepared. This makes it look like actual Mars mission hardware (precursor) is to be built soon, while also preparing for development of the lunar stations NASA's prime partners (ESA, JAXA, etc) view as higher priority than Mars.

  22. Technology barriers by sjbe · · Score: 2

    There are no technology barriers to a manned mission to Mars.

    You're kidding right? We have built barely any of the stuff you cite. We certainly don't have any of it ready to pull of the shelf and send to Mars. We don't have human rated habitats for that kind of mission or duration, we don't have life support systems, we haven't figured out the physiology problems, we haven't even tried building a spacecraft surrounded by water and certainly don't have any other type of shielding, etc. The notion that there are no technological barriers is just nonsense. We can probably figure them out with enough time and money but that isn't the same as saying we are ready to go to Mars. Absent a crash program to work on all this (which won't happen) it's going to take decades to work out the technical details. We've only been outside of low earth orbit a handful of times and nothing longer than a few days. I don't mean to be rude (seriously I don't) but if you seriously think we've figured out all the technical problems you don't adequately understand the problems.

    I think you are correct that the financial and political barriers are the bigger problems but let's not understate the technical ones.

  23. Re:Prison, seriously. by khallow · · Score: 1

    model it after a prison

    No. They have a variety of special needs that don't apply to a space station such as safely containing dangerous people (and the resulting control on going in and out). Further, you want more than the lowest, most basic needs because you want your astronauts to be working, not sweating in a cell.

  24. Re:Prison, seriously. by Tablizer · · Score: 1

    Don't drop the space-soap.

  25. Re:Just give the money to Elon Musk by thinkwaitfast · · Score: 1

    Think of all the money they would save if they skipped the probe part. Besides, all of the probes have been built by defense contractors. NASA doesn't build anything. They write up a list of requirements, send out an RFQ, choose a vendors, do some oversight (QA), take deliver, do an RFQ for launch system, choose vendors, oversee final integration and launch and and off operation of spacecraft to university handing out paychecks along the way.

  26. Re:No mission without existential crisis (probably by khallow · · Score: 1

    At this point in human history all of our expenditures are based on returning an increasing amount of revenue.

    It's worth noting that all progress is a result of effort that returns more than was put in. Profit is a standard measure of that.

    It will be the death of all innovation if it continues at this rate and Musk will need to figure out how to counterbalance the weight of millions of mba's following recipes for success which do not include investment into the company

    It's because modern society stamps out risk wherever they find it. Why make long term decisions when the short term ones are always profitable? A similar situation goes on at the personal responsibility level. For long term planning to be relevant, there has to be good consequences to doing it well as oppose to poor consequences otherwise.

  27. Re:KSP by Falos · · Score: 2

    I'm sure that in 2085 a gigaton of rocket fuel is available in every corner drugstore but in 2015 it's a little hard to come by!

    Anon! I'm sorry, but I'm afraid you're stuck here!

  28. Dropping rocks by sjbe · · Score: 1

    If you think dropping large rocks onto Earth's surface is even remote possibility at this point, you need to take a few physics classes.

    If you have the tech to mine asteroids you will have the tech to drop the asteroids onto the planet. It's like nuclear power. If you can build a power plant you can build a bomb. You don't get one without the other.

    And I happen to have a college minor in physics as well as a pair of engineering degrees so I've taken "a few" physics classes.

  29. Re:Duh! by Pseudonym · · Score: 1

    I was thinking DSS K-7. But honestly, I'd be happy with Space Station V at this point.

    --
    sub f{($f)=@_;print"$f(q{$f});";}f(q{sub f{($f)=@_;print"$f(q{$f});";}f});