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Will Mars be a One-way Trip?

alexj33 writes "Will humans ever really go to Mars? Let's face it, the obstacles are quite daunting. Not only are there numerous, difficult, technical issues to overcome, but the political will and perseverance of any one nation to undertake such an arduous task is huge. However, one former NASA engineer believes a human mission to Mars is quite possible, and such an event would unify the world as never before. But Jim McLane's proposal includes a couple of major caveats: the trip to Mars should be one-way, and have a crew of only one person."

8 of 724 comments (clear)

  1. Re:A few very complicating points... by ceroklis · · Score: 4, Informative

    NASA does not sterilize probes it sends
    Sure: http://planetaryprotection.nasa.gov/pp/.
  2. Lindbergh by fm6 · · Score: 5, Informative

    Charles Lindbergh is supposed be the inspiration for this, but the guy knows jack about him. Lindbergh didn't set out to do a risky stunt. He was contending for the Orteig prize for the first aircraft to fly New York/Paris (either way) non-stop. Several previous attempts had ended tragically, and Lindbergh was convinced they failed because previous designers had not paid enough attention to various safety margins, especially those relating to weight and fuel. Thus he designed a plane that put fuel tanks in every conceivable space (including the place where any other aircraft would have had a windshield!) and did everything he could think of to minimize weight.

    That's why he flew alone: it's not that hard to stay awake for 36 hours, and so he saw a co-pilot as unnecessary extra weight.

    Ironically, he got lucky and didn't drift off course as much as he assumed he would, arriving at Paris with enough leftover fuel to continue to Rome. But he designed his plane on the assumption that he would not be lucky. He was a safety-first guy, that's why he succeeded where others failed. It ridiculous to associate him with this insane proposal.

  3. Re:At least two? by Captain+Nitpick · · Score: 4, Informative

    Four people isn't enough to start a colony. You need enough unrelated folks to prevent genetic drift. Not sure how many, but it's a lot more than 4.

    Wikipedia cites anthropologist John H. Moore as saying the minimum reasonable size is around 170. I'm assuming these individuals would be measurably unrelated.

    --
    But then again, I could be wrong.
  4. Werner von Braun's plan by Animats · · Score: 5, Informative

    Werner von Braun's plan for going to Mars was published in the 1950s. It's worth reviewing it.

    1. Build a two-stage rocket that can lift reasonable loads to Earth orbit. The first stage, the big booster, is recoverable with parachutes. The second stage can re-enter on wings.
    2. Build a large number of these rockets, hundreds of them. This is the big difference from NASA's current one-off thinking.
    3. Build a big wheel-type space station in Earth orbit, using several hundred launches of the big boosters. This is the base for the Mars shot.
    4. Use about 400 launches (!) to move the Mars fleet of 14 rockets into Earth orbit, along with the necessary fuel.
    5. 14 rockets take off for Mars, with about a hundred people.
    6. The rockets land on Mars on wings. (This wouldn't work. Von Braun didn't have data on Mars' atmosphere. Back then, it was thought that Mars had maybe 20% of Earth's atmospheric pressure. The actual number is about 0.6%. This is a serious problem. We do not, in fact, know how to land a big load on Mars. The combination of heat shield and parachute used for small robotic craft isn't enough. Power is required, which means lugging fuel for landing.)
    7. A sizable base is built, exploration takes place.
    8. Some of the rockets return to Earth, to dock at the Earth space station.

    Ah, the good old days of industrial production. If China does a Mars program, it might look like that.

  5. Sterile probes? by neapolitan · · Score: 4, Informative

    >>NASA does not sterilize probes it sends.

    > Yes, they do.

    No, they don't. Please read up on what "sterilize" means and stop spreading misinformation.

    Oh, heck, you probably would have done it by now if you were going to.

    Sterilize = kill ALL bacteria. You can put something that has been sterilized in your bloodstream and not get direct infection or exposure to bacteria.

    Sanitize = kill bacterial to a certain threshold or standard, or kill harmful bacteria. You can lick something that has been sanitized and probably not get sick. However, if you cultured that hospital toilet seat, you can be sure you'd get bacteria.

    Bioload reduction = "We're pretty much sure that it is not covered in stool or loads of harmful bacteria, but beyond that can't say."

    It is almost impossible to build something the size of Mars rovers and have it be STERILE. Anything exposed to general atmosphere for over 20 seconds or so is no longer sterile. Even in the O.R. (which has special filters and a non-recirculating atmosphere) things exposed to the air for prolonged period are considered unsterile. If any of you guys worked in a bio lab, open up a can of L.B. broth, and walk away. After 20 minutes, recap it. What happens?

    I really appreciate whoever sent me the planetary protection link, and it confirmed what I thought. We are *very* concerned about bringing foreign / alien bacteria here, but it is just about impossible to keep us from spreading our own throughout the universe.

    --
    Slashdotter, ID #101. UIDs are in binary, right?
  6. Orion spaceships, wimps! by sudog · · Score: 4, Informative

    You all are looking at this in completely the wrong way. The cost of getting stuff up into space doesn't have to be significant. We can send tonnes and tonnes and tonnes of crap up there relatively inexpensively, and the vehicle to do it would be reusable and have a significant lifetime. Just build an Orion spaceship. Piece of cake. We can send thousands of people up, tonnes of supplies.. heck we could launch an entire colony in one shot, and not really have to worry much about carefully conserving every gram of fuel.

    What's an Orion?

    Glad you asked: Orion Spacecraft Rule

    Nuclear pulse propulsion behind giant push-plates on springs, man! With a payload measured by the tonne rather than the kilo!

  7. Re:I mean... by tenco · · Score: 5, Informative

    It doesn't even qualify for being a planet based on the new rules (keeping its orbit clear of other stellar objects) -- Phobos and Deimos are evidence for that. FUD. Phobos and Deimos are moons aka satellites of Mars. And satellites have been cleared
  8. Re:I mean... by ceroklis · · Score: 4, Informative

    Actually, all three were fake. The real ones were hidden underneath.