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Space Science

Debunking the Trillion-Dollar Space Myth 590

jfoust writes "When the President and NASA announced the agency's new space initiative, including sending humans back to the Moon and on to Mars, many news reports claimed that the plan could cost as much as $1 trillion. According to this Space Review article, that trillion-dollar price tag is a myth: it was based on erroneous data and analysis, in large part by a single Associated Press reporter, and propagated by many other reporters too busy -- or too lazy -- to check on the facts. Could this kill the plan before it has a chance to start?"
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Debunking the Trillion-Dollar Space Myth

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  • What? (Score:5, Funny)

    by deanj ( 519759 ) on Monday March 22, 2004 @03:04PM (#8637238)
    A reporter not checking facts? I'm shocked I tell you!

    Next thing you know, you'll be telling me that someone on slashdot did the same thing!

  • if you give me 1 trillion dollars
  • I'm just curious (Score:4, Interesting)

    by SixDimensionalArray ( 604334 ) on Monday March 22, 2004 @03:06PM (#8637270)
    Let's just say it MIGHT cost $1 trillion. I have always wondered, where/how exactly is all that money spent? Why does it cost so much?
    • Re:I'm just curious (Score:5, Informative)

      by IWantMoreSpamPlease ( 571972 ) on Monday March 22, 2004 @03:15PM (#8637379) Homepage Journal
      FWIW-

      I used to do oversight work on contractors that did gov't jobs.

      The lowest bidder (usually) got the contract, but then, whatever they could charge Uncle Sam with a straight face (unforeseen delays, cost overruns, etc) the US paid without comment.

      So a typical job of 250,000$, when it was all said and done, might actually have cost the gov't over 600,000$. Now start adding multiple contractors to a huge undertaking like this (one builds the suits, another the food, a third the life support, etc) and you can *easily* see where the original figure paled in comparison to the final pricetag, with most of that simply being pork and profit.
      • by ThosLives ( 686517 )
        per'aps, but $1 Trillion is the equivalent of 10 million man-years of salary - at an annual salary of $100,000! I use man-years of salary because, after all, even material costs end up becoming labor costs (well, raw materials are a weird combination of labor costs and market demand, but it boils down to how many people it takes to dig stuff out of the ground).

        so, $1 Trillion over ~30 years means they're guessing it will take the world somewhere more than 300,000 people working on this project a year for

    • This article in Spacedaily [spacedaily.com] does a good job of explaining why Bush's costs are both too much and too little to do what he wants. I love the quote:

      This is what John Pike means when he says that the budget "won't even pay for the artwork." (Pike is exaggerating the situation by a factor of about 2. I am not aware of any single NASA program costing more than about $3B that produced only artist's concepts. X-30/NASP cost about $7.5B in current dollars, and part of one X-30 fuel tank was actually fabricated.)

      If $3B can manage to pay off consultants to think deep thoughts about a project and an artist to draw up a rendering then $1T isn't really that much in the world of gov't finance, high payed consultants and contractors used to dealing with the military where any price goes. It would be interesting to see what an X-Prize sized budget passed 100km orbit would look like.

  • by hyperherod ( 574576 ) on Monday March 22, 2004 @03:06PM (#8637272)
    "Humor writer Dave Barry, however, may have summarized the situation the best. "The Bush administration says the Mars mission can be accomplished for only 143.8 zillion dollars," Barry wrote. "But critics claim that the true cost is likely to be much more like 687 fillion dillion dollars. (These numbers are imaginary, but trust me, they're as accurate as any other cost estimates you see about the Mars mission.)""
  • The Pentagon will pay over $500 for a screw, so why not a trillion for a trip to the moon? Why would they care how much it costs -- after all its not their money?
    • by Anonymous Coward
      " The Pentagon will pay over $500 for a screw,"

      That's nothing, I've gotten married, and believe me, those few screws were hardly worth the $500K its cost me over the past 20 years.
    • by Urban Garlic ( 447282 ) on Monday March 22, 2004 @03:26PM (#8637505)
      And why not? In some parts of Vegas, $500 is the market price for a screw...
    • I challenge anyone out there to fabricate 1 unique screw to exacting tolerance and strength requirements for less than $500. For that matter make one unique toilet seat for less than $200.

      Or for one more example, during the Desert Storm flavor of Iraq wars someone thought they would save money getting fax machines from an office supply company rather than the expensive Mil-Spec ones. They had a half life of some fraction of a day (heat, sand, grit, noise adn vibration of F18 takeoffs).

      There is waste fuele

  • by shadowmatter ( 734276 ) on Monday March 22, 2004 @03:08PM (#8637287)
    I mean, how the hell are we going to put a man on Mars for 1 trillion dollars when it takes <dr="evil">one hundred billion dollars</dr> alone to keep a laser on the moon from destroying Earth?

    Really people, think it through.

    - sm
  • by zamboni1138 ( 308944 ) * on Monday March 22, 2004 @03:08PM (#8637291)
    It could easily cost at least one trillion dollars over the next 20+ years to get humans to Mars. Look at how much the U.S. thought it would cost originally to get to the Moon, $10-20 billion. And you know they spent way more than that actually doing it. $20+ billion to get the Moon 30+ years ago can easily translate to $1+ trillion to get to Mars in the next 20 years.

    You also must consider all of the technologies that were gained and/or improved during the race to the Moon. Computers, communications and fuel cells is just the very short list. What do you think one trillion dollars can get us this time around? Perhaps IPv6 deployment.
  • by Stitch_626 ( 744380 ) on Monday March 22, 2004 @03:08PM (#8637294)
    It seems like more and more that people are just printing/reporting what ever "facts" they come across to forward their own agenda.

    A good example is that story that ran last week where they almost banned styrofoam cups because they read on some kid's website about the dangers of "di-hydrogen monoxide" (Water) or whatever the scientific name is.
    • by Otter ( 3800 ) on Monday March 22, 2004 @03:27PM (#8637512) Journal
      The bottom line is -- a manned mission to Mars is going to cost an enormous freaking pile of money, and no one can estimate the size of the pile with even moderate precision.

      I can't get too upset for reporters using "$1 trillion" as a metaphor for "unknown but freaking enormous pile of money" -- it's not like this is a bond issue. Or (and I'm saying this as a likely but not certain Bush voter) the shamelessness with the cost of the Medicare bill.

  • by goon america ( 536413 ) on Monday March 22, 2004 @03:08PM (#8637296) Homepage Journal
    Well, the president's plan only calls for an additional $500m/year of NASA funding (2/3 the cost of the current unmanned probes), so who's kidding who?
  • by fataugie ( 89032 ) on Monday March 22, 2004 @03:08PM (#8637302) Homepage
    "It's probably a misplaced decimal point....I always screw up some mundane detail like that"

  • It's kinda sad. One of the few inititiaves I approve of from the current Bush administration, and it is stillborn due to reporter bias and misinformation.

    Reporting is supposed to give facts, not 'plausible assumptions'.
  • Comment removed based on user account deletion
  • by OpenSourced ( 323149 ) on Monday March 22, 2004 @03:09PM (#8637311) Journal
    Nobody can estimate the price tag of sending a earthling to Mars. So the 1 trillion figure is a good way of saying "it'll be very, very, very expensive". In fact, the figure is too round to be taken seriously, and the real price could be much lower, but also much higher.

  • by rhadamanthus ( 200665 ) on Monday March 22, 2004 @03:09PM (#8637313)
    This trillion-dollar figure may hurt the program yes, but two other things will have much more impact:

    1) Bush does not really care if it is funded or not. The speech and goals are just political mumbo-jumbo, like his AIDS research promises...
    2) NASA is more than adept at killing projects themselves. Money is tight here now (I work at NASA and am embroiled in the CEV start-up operations) and NASA is terrible at managing a tight-budget program like this would have to be.

    Beuracracy will kill this program before any "reporter", trust me.

    --rhad

    • by argStyopa ( 232550 ) on Monday March 22, 2004 @03:34PM (#8637575) Journal
      1) Bush does not really care if it is funded or not. The speech and goals are just political mumbo-jumbo, like his AIDS research promises...
      2) NASA is more than adept at killing projects themselves. Money is tight here now (I work at NASA and am embroiled in the CEV start-up operations) and NASA is terrible at managing a tight-budget program like this would have to be.


      ^^^ Precisely the point of the article. It seems that people of a certain political bent are willing to condemn and set aside ANY goal, no matter how admirable, or how much they would have supported said goal if it wasn't THIS PRESIDENT promoting it.

      Look at point number one, above. Stated as unassailable fact, this person clearly has such a terrific AXE to grind, they aren't interested in even considering that it might be simply true. They just slap on their tinfoil hats and rant because it is George W. Bush.

      Just like his AIDS initiative you say? He committed $15 Billion - 3x the US gov't's previous funding. You say it's smoke & mirrors, but the money's already flowing.
  • Sounds like damage control to me. They probably issued some number then the reporter, knowing good and well that government estimates are never accurate (remember that surplus?), probably made an educated estimate of what it would really cost taxpayers.
  • by Ars-Fartsica ( 166957 ) on Monday March 22, 2004 @03:09PM (#8637318)
    Of course an industry zine is going to talk down the costs of space projects, particularly Mars. Its in their interests to get these projects past Congress.

    Look at the reality though - ISS, Shuttle etc. Name one of these programs that has not overrun its budget by a substantial margin.

  • A lot of that figure comes from early estimates from George Bush Sr.'s big spcae announcement back in 1989. That plan was a lot more ambitious, however, as it entailed the construction of a massive, futuristic-like space station in addition to the International Space Station, among other costly items. I believe our current president's plan will be significantly more financially sound.
  • by Billy the Mountain ( 225541 ) on Monday March 22, 2004 @03:11PM (#8637332) Journal
    Heck, I'll even kick back in a hefty campaign contribution.

    BTM

  • $1 Trillion!? Good thing that is a Myth. Someone would have to be getting on the ball with some Open-Source stuff for these guys... =P Not even Microsoft has that kind of money.
  • by scruffy ( 29773 ) on Monday March 22, 2004 @03:12PM (#8637355)
    that trillion-dollar price tag is a myth
    All the other price tags are just plain old lies.
  • by Doesn't_Comment_Code ( 692510 ) on Monday March 22, 2004 @03:15PM (#8637387)
    After further investigation, the budget breakdown is as follows:

    Space craft - $500 Million

    Mission control &
    Support crew - $2 Million

    Fuel - $800 Thousand

    Diebold navigation system - $20 Million

    SCO license for onboard CPU's - $699 * 500

    Anti Virus software to ensure Windows
    based fire suppression system
    isn't infected before liftoff - $200

    Man hunt for someone smart enough
    to operate the spacecraft yet dumb
    enough to ride it to Mars - $1 Trillion
  • by el-spectre ( 668104 ) on Monday March 22, 2004 @03:16PM (#8637398) Journal
    Could this kill the plan before it has a chance to start? No, what will kill the plan is when NASA's responsibility is massively increased, but their funding only increases a few percent....

    (The cynic in me noted the timing of W's announcement... "War? Death? um... Hey, Lookit the Moon! Lookit Mars! Perty, eh y'all?")
  • Actually (Score:5, Insightful)

    by be-fan ( 61476 ) on Monday March 22, 2004 @03:17PM (#8637414)
    Amortized over a decade or more of work, $1 trillion doesn't seem so bad. Especially considering $100bn/year is a fraction of what we spend on our military.
    • $100bn is still a shitload. If I recall correctly, the military budget [whitehouse.gov] is about $400bn. 25% of that is a sizable amount and more than I'm even willing to spend on NASA and I'm a space nut.

      I suggest everyone check out Mars Direct [nw.net]. It's a plan estimated by its creator to cost around $20bn to start up and $2bn per mission. Even NASA's version is only $60bn when they ran their numbers.

      One last thing. The 90-day report figure of $400 bn back in the early ninties was based on the Werner Von-Bruan plan of M
      • I suggest everyone check out Mars Direct. It's a plan estimated by its creator to cost around $20bn to start up and $2bn per mission. Even NASA's version is only $60bn when they ran their numbers.

        Mars Direct is so cheap for several reasons;

        • It assumes that it will be able to leverage on work done by other people.
        • That no problems arise during the development process.
        • That there is no inflation during the development process.
        • That there are no unforseen problems, landmines, etc...

        Virtually every page is f

  • Solution (Score:4, Funny)

    by JediTrainer ( 314273 ) on Monday March 22, 2004 @03:20PM (#8637439)
    There's a simple solution - I bet we can outsource it to India. They can probably send a guy there for a hundred bucks or so.

    Whether or not he arrives in one piece, however, was a minor omission in the requirements document, much to his later dismay.
  • $1 trillion (Score:5, Funny)

    by FrostedWheat ( 172733 ) on Monday March 22, 2004 @03:21PM (#8637451)
    the plan could cost as much as $1 trillion

    Yea, but what the reporter failed to mention was that this is Canadian dollars.

    The whole mission will actually only cost $9.99. With a few subsidies...
  • by Imperator ( 17614 ) <{slashdot2} {at} {omershenker.net}> on Monday March 22, 2004 @03:25PM (#8637496)

    So suppose it's "only" $100 billion. Why, exactly, is it justified? We can do the science far more cheaply with robots, and if a robot burns up on entry, no one has to attend any funerals. The typical arguments I see on slashdot boil down to:

    1. Space is cool.
      Yeah, and so are lots of things. Doesn't mean we should spend government money on it.
    2. We can't stay on Earth forever.
      True, in billions of years the sun will swallow up the inner planets. More realistically, if we keep trashing the environment life will eventually be very uncomfortable for us. But space technology right now can send up a handful of astronauts at a time. We're not about to migrate overcrowded populations to the moon. (Human migrations in the past have all been much cheaper, even in relative terms.) The solutions to our problems on Earth should involve fixing our behavior on Earth, not giving up on it and fancifully migrating elsewhere.
    3. Space exploration leads to technological spin-offs.
      Give me a break. If we want to sponsor scientific or technological research, we can do that much more efficiently by giving grants directly. Space research really hasn't produced much anyway, per dollar, compared to defence spending. It was the military, and not the space program, that drove the development of the microchip. The space program has given us... Tang. The "science experiments" done on the Shuttle nowadays are mostly nonsense anyway; the real ones could be done far more cheaply by robots anyway.

    I support unmanned space exploration designed to further the pursuit of science. But manned space flight is incredibly expensive in comparison, doesn't really do much for us, and sucks resources away from real science.

    • by drinkypoo ( 153816 ) <drink@hyperlogos.org> on Monday March 22, 2004 @05:30PM (#8639098) Homepage Journal
      There are basically two points to going to Mars. Both are valid, IMO. The first is basic scientific exploration; Has there been life on Mars? How much water is really there? Etc etc. Mars can tell us a lot about Earth while we're learning about Mars. The second is, just to put people there! Even with space elevators you're unlikely to make much of an impact on population (though you could try implementing birth rate controls and exporting people families with members who get pregnant too many times I guess) :)

      Your message will be 100% correct when a robot on the ground can do as much as a human being there. In order for this to be true we need (besides advances in power storage and all the technologies involved in robotics) instaneous communications at least throughout the solar system, or true artificial intelligence. Since neither of these technologies are likely to be discovered in the near term, it is arguably worth sending humans on such journeys. You could also make the argument that we would do better to spend our efforts on exploring our own world, but the benefits of the space program to date have been enormous, and there is so much more to be done that I think equivalent strides can yet be made in its pursuit.

      Manned space flight is expensive because we have not committed to a certain volume of it, at which point it will begin to drop in cost as we get better at it, then drop further once it has become commercialized. Ultimately our research into materials technologies is bringing us closer to affordable space travel. The less weight you need to loft the easier it becomes in general, the more power you have available the better, and the more efficient a system is, the better - this is all obvious but what might not be obvious is that all systems tend to do this over time and then be replaced by a system which typically has problems the current leader lacks but also has additional or greater capabilities in other areas. To wit, it's getting cheaper all the time. It's getting cheaper because we're trying to do it (and other related things) and we're solving problems in order to get there. Manned space flight is harder, so you'll encounter more problems, and provided you persevere, you'll solve more problems.

      I think we've amply proven that manned spaceflight is a solvable problem (And now three nations have done so) so perhaps we should work on applying it for more than taking pictures and planting flags. This is not to cheapen the work done by astronauts on any mission which has been flown, but we could be doing so much more with technology which we have already utilized. With the advances since then, we ought to be able to go to Mars relatively cheaply.

      But you do have to learn to walk before you can run, and we have been sending probes there. What we've learned since putting them on the ground has been enough to sharpen and even increase our resolve to go there, because it's (almost) all that we hoped it would be. (Obviously it didn't turn out to have a thick atmosphere.)

      • An interesting article just appeared by the physicist Steven Weinberg.

        http://www.nybooks.com/articles/17011

        Excerpt:

        "Looking into the future, we need to ask, what scientific work can be done by astronauts on Mars? They can walk around and look at the terrain, and carry out tests on rocks, looking for signs of water or life, but all that can be done by robots. They can bring back rock samples, as the Apollo astronauts did from the moon, but that too can be done by robots. Samples of rocks from the moon wer
  • by DynaSoar ( 714234 ) * on Monday March 22, 2004 @03:34PM (#8637570) Journal
    Had NASA been allowed to sell and license its patents like a normal company on just 4 of the things it improved on during the 70's, microprocessors, cryogenics, medical telemetry and systems analysis software, it would have made 450% profit between the start of the Mercury project and the end of Apollo. Instead, we got the spinoffs which are fine for improved quality of life, and the companies that bought the patents made some money which is fine for some peoples' living standards, but the program itself suffered.

    Want to get to Mars? Fund an aerospace skunkworks with NASA level funding and let them keep the profits from the inventions. And keep the damn adminimonsters out of it; let the engineers run it.
  • by kippy ( 416183 ) on Monday March 22, 2004 @03:41PM (#8637630)
    A little history on this is in order. Imagine wavy vertical lines transporting you back to the past.

    The year is 1989 and I'm growing out a mullet. The first president Bush makes an attempt to rejuvenate NASA by setting Mars as a goal. Since he's a politician and not a scientist, he delegates the details to a group to give him a plan and price tag. What he got was the infamous 90-day [pescu.net] report. The 90-day report amounted to implementing a Mars exploration plan that included every pet project that NASA had. It involved building giant craft [starwars.com] in orbit, sending them to lumbering to Mars, have a crew land for 2 weeks and then go back to Earth. The estimated cost was an insane $450 billion which they comically expected to get. At the time, I was too concerned with getting my hands on a Sega Genesis to care or understand.

    NASA had lost their minds and took the presidential initiative to mean that they were getting a blank check for everything they ever wanted to fund. King George the First saw the price and turned them down flat. He wasn't aware that there were any other ways to do it so it was slated to happen in "the future". Since then, there have been several [nw.net] different [marsinstitute.info] plans [nasa.gov] developed to get to Mars on a tight budget and stay there long enough to do some real science and establish a permanent presence.

    Wavy lines back to the present.
  • by alizard ( 107678 ) <alizard.ecis@com> on Monday March 22, 2004 @03:44PM (#8637664) Homepage
    We can get a space power demo satellite and infrastructure to support the construction of a global space powersat network for a comparable amount of money. [ecis.com]

    I think a permanent solution to the energy crisis that leaves the US with no need for a Middle East political presence that costs a few hundred billion and creates millions of jobs can be sold to the American people.

    I do not think that the American people either can or should be sold on a program which will mainly bring back some cool video of people wandering around collecting Mars rocks and the rocks themselves.

    If we build a space industrial infrastructure, we will know how to get to Mars cheaply, comfortably, and safely.

    We need space as a place to put industry. If we get industry up there, doing science up there will be cheap... it's a lot cheaper to send science grad students up if there's lab and housing space up there for them.

  • Popular Science (Score:3, Interesting)

    by LuxFX ( 220822 ) on Monday March 22, 2004 @04:05PM (#8637956) Homepage Journal
    The April '04 edition of Popular Science has an interesting article about the top seven or so engineering projects/dream-projects today. One of them was the in/famous space elevator. What was particularly interesting was that the estimated cost was only $10 billion. (that's 1/10 of what the US has already spent in Iraq, for those counting)

    Now I've always thought that the reason we aren't already building space elevators is because we haven't got anything strong enough for the cables. But according to the guy the $10 billion figure came from, all we need is a little more nanotube development and we're there.
  • by zakezuke ( 229119 ) on Monday March 22, 2004 @04:14PM (#8638079)
    I think there are people out there who still believe that nasa spend millions / billions of dollars to develop a pen that would work in outerspace. http://www.spacepen.com/usa/index2.htm

    According to this site
    http://www.snopes.com/business/genius/spacep en.asp
    there was a pen developed by Fisher, and sold 400 to nasa in the late 60s at a cost of $2.95 a piece. Also according to the site, over one million was spent by Fisher for development.

    Now... i've heard references over the years regarding this pen, mostly jokes how the former Soviet Union's space program saved money by using pencils, and even as an illistration for NASAs over spending. The figure seems to range between 1 million all way to 12 billion in some cases. But regardless of whether Nasa actually spent money to develop this technology or not, it is still perceived by many to be a fact and not just an urban legend.
  • by Bendebecker ( 633126 ) on Monday March 22, 2004 @04:33PM (#8638289) Journal
    Come on, we are looking at the same ppl who reported that the space shuttle columbia was travelling at 9 times the speed of light when it cracked up. It was on CNN so it must be true...

    At my college, journalism is an easy major - aka. you'd have to be retarded to get less than a 4.0 in it, the average journalism student is more interested in the college lifestyle (drinking your way through college so that at the end of it you wonder where the time went cause you don't remember the last four years, having more than sex than a trailer trash hoe), and if you had a cent for every iq point, the entire sum of their iqs together wouldn't get you a hamburger at MickeyD's. Then when they get out, its all about who you know, not what you know. In other words they get a rich uncle to get them on the air. Is anyone at all suprised to learn that the media is now as dumb as posts?
  • media myths (Score:3, Interesting)

    by nursedave ( 634801 ) on Monday March 22, 2004 @05:31PM (#8639119) Homepage Journal
    This article is very well written; it reminds me of the book by John Stossel that I am currently reading, "Give Me a Break." He points out how reporters have no problems with drawing illogical conclusions or making things up if 'big business' is being pilloried, but if one points out the ineffectiveness and stupidity of government programs, he is proclaimed by the fruit-n-granola crowd to be 'a shill of big business.'
  • by forgetful ( 725420 ) on Monday March 22, 2004 @06:18PM (#8639706)
    Speaking in generalities: It takes approximately as much energy to go from low earth orbit (LEO) to escape velocity as it takes to go from the launch pad to LEO. In other words you must lift as much additional fuel to LEO as it took to get the object to LEO. The Space Shuttle is one of the most efficient lift systems (but the Russians and US have done quite well with big dumb rockets--it just takes a lot more fuel). It takes approximately 3 million pounds of fuel to lift the very efficient 200,000 pound Shuttle into orbit. That is a fuel/payload ratio of about 15 to 1. To accelerate the Shuttle to escape velocity it would take another 3 million pounds of fuel, but it would take 45 million pounds of fuel to lift that 3 million pound to LEO. In other words, it would 15 SHUTTLE BOOSTER launches to get that escape fuel into orbit (assuming you lifted only the escape fuel and did not use the Shuttle ). Different design and fuel arrangements can reduce the fuel requirements a little, but this gives you an idea of why it took such a huge rocket to go to the moon. The Apollo Saturn 5 was the most powerful machine ever built. During launch, the Saturn 5 generated as much power per second as all the powerplants in America at that time! If you are planning a return trip, then you must also lift to Earth LEO and Earth escape velocity: 1) fuel for deceleration to orbit around the other world, 2) fuel to decelerate to the surface of the other world, 3) fuel to lift from the other world to low orbit, 4) fuel for escape velocity from the other world for the transit ferry , 5) fuel for deceleration upon return to Earth, either in one stage or two, that is to LEO and then to Earth. If you do it in two stages you can lift the landing fuel and vehicle to LEO without carrying it all the way to Mars, i.e., use the shuttle or a Russian lander to bring the Martianauts home from Earth orbit. Either way the return vehicle is going to be going 30,000 to 60,000 mph when it reaches Earth after falling 30-40 million miles into the solar gravity well. In other words, it is going to take more fuel per unit vehicle mass to slow the vehicle back down to Earth orbit velocity than it did to to escape from Earth going out! 6) and maneuvering fuel going and coming. That is why some are proposing to manufacture the return fuel on the Moon or Mars, so you don't have to lift the off-world return fuel all the way from Earth to Mars and then back. Of course it would take huge amounts of fuel to get the manufacturing equipment to Mars or the Moon to begin with. You can use modules and reduce the amount of fuel for each step: small Mars lander, small return vehicle to Mars low orbit, but I'll bet the Earth-Mars transit ferry will have to be at least 200,000 pounds. You can't expect the astronauts to sit in a telephone booth for four to six months. There are other design proposals to reduce the amount of fuel needed: ion drives, solar sails, aero-braking for Mars, etc., but IT IS GOING TO TAKE A SATURN 5-CLASS PROPULSION SYSTEM PARKED IN EARTH LOW ORBIT TO GET THE CREW TO MARS AND BACK. You save a lot of fuel with a nuke powered Earth-Mars transit vehicle, but it is no magic bullet. Nuke engines are heavy and only double the specific impulse over the the Shuttle LHLO. The limiting factor is the temperature tolerance of your propulsion system materials, not the energy contained in a fission reaction. It is still going to take huge amounts of fuel. But then, I'm no rocket scientist. Do I think the U.S. ought to do it. Dern right!

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