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Disease May Prevent Manned Journey To Mars
Pickens writes "Science Daily News reports that human missions to Mars and all other long-term space flights might be compromised by disease, first because space travel appears to weaken astronauts' immune systems; and second, because it increases the virulence and growth of microbes. 'When people think of space travel, often the vast distances are what come to mind first,' says Jean-Pol Frippiat from Nancy-University in France, 'but even after we figure out a way to cover these distances in a reasonable amount of time, we still need to figure out how astronauts are going to overcome disease and sickness.' Frippiat says studies show that immune systems of both people and animals in space flight conditions are significantly weaker than their grounded counterparts and that common pathogens such as Salmonella, E. coli and Staphylococcus reproduce more rapidly in space flight conditions, leading to increased risk of contamination, colonization and serious infection."
Well, we had people on long term space missions on Mir and ISS that are comparable in time with a mars mission, without them being eaten alive by E. coli, Salmonella and whatnot. What was the problem again?
Ubi solitudinem faciunt, pacem appellant.
While getting rid of salmonella is good, you can't get rid of all disease causing bacteria. And if the environment you live in is too sterile, your body just becomes more susceptible to other infections and to auto-immune disease.
Injecting antibiotics is about the worst thing you can do because it really messes up your bacterial ecology. Bacteria are a natural part of your body, and if you start killing them with antibiotics, things go wrong. Antibiotics should really only be taken when there is a serious infection present.
In addition to artificial gravity (via rotation), the solution may be to challenge the body with other microbes that are known to be not too harmful, similar to "pro-biotic drinks".
Why do we care about sending our meatbag selves to other planets? I'd be more productive if we could just send some strong AI to do it for us.
Hmm, I was thinking those words were gonna be: selective breeding.
Until that works out, I suggest we focus on telescopes and probes, rovers, and those things that float in seas of frozen methane. Also as a way to reduce our carbon emissions by using lower weight vehicles.
Maybe we're meant to be on Earth after all? The conditions seem just fine, ... for now at least.
But please, send more robots first. They can do a lot more with a lot less controversy.
Of course, by the time we have the technologies you propose, we're just as likely to have ion propulsion that can get us there in less than a month.
-jcr
The only title of honor that a tyrant can grant is "Enemy of the State."
Boy how would those trips compare to early the first voyages to the "New World", except that they will probably be more clean, more antiseptic, and their health will be monitored much more closely.
What's worse tuill now no one has pointed this out. What pussies we've become.
The conquistadors at the 15th century were able to travel long distances on ships full of diseases, and yet conquered and eliminated the native civilizations of America. Diseases may be a difficulty, but they won't prevent space travel.
Works in theory, but a rotating spacecraft would in practice be a horrible experience. To achieve enough "artificial gravity" the angular velocity needs to be pretty high (assuming that the diameter of the spacecraft is much smaller than the diameter of the earth), which in turn generates a lot of coriolis forces. These coriolis forces are not very pleasant. Ever been on a thrill ride in an amusement park? Imagine being stuck in such a rotating thing for more than a limited amount of time...
Quantum hacker.
Jesus christ, its captain obvious! We are talking interplanetary space missions. OF COURSE its not feasible in the near future. Any mission to Mars of significant size will require major construction in space. Duh. Which is one of the missions of our current space programs, getting that experience and ability. We have built a space station you know. In space, with construction workers, in space.
What a retarded comment.
Your immune system responds better if there are constant challenges to it, which is what a diversified ecosystem does.
Lots of sex.
Without condoms (and with swallowing). Regular exchange of bodily fluids also keeps your immune system ticking over. Regular sex might help morale as well.
No but yeah but yeah but yeah no but yeah no but yeah... ...but no
because that may result in this! And that's no diversity what you see although it may be interesting to watch this move around Mars for a while and it cleans things up here a little.
Not necessarily. Two masses tethered together and spun up would do it. Say a big heavy nuclear drive, and the crew module. You have a boost phase, then reel your drive out on the tether, then spin them up. He presto, fake gravity.
The answer is to build a faster spaceship. We need to have nuclear powered craft of some sort. The distances are simply too vast for chemical rockets. You could spend billions trying to study all the ways to keep people up in space safely for two years and probably still screw it up. The enemy is time, so solve that problem, and everything else will fall into place. That at least can get us around the solar system, and there should be enough materials in that to build some sort of an interstellar craft for extremely long range missions.
This is my sig.
By the way, if USA did not engage in the Iraq and Afghanistan wars, it would have the money to build that spaceship *by itself*.
Actually, yes...
There are two basic possibilities here:
1) low gravity enhances microbe growth. -- Eh, probably not enough in itself, since the microbial balance would probably still be roughly the same.
2) if the environment is made too sterile, it actually encourages pathogens, which are normally kept largely in check by other microbes. This is actually the root of the problem with hospitals and resistant infections today, to the point that some are considering returning to a less-sterile general environment. -- Easily solved; just don't sterilize the equipment in the first place. In short, maintain the diversified natural microbial population, to discourage overgrowth of pathogens.
~REZ~ #43301. Who'd fake being me anyway?
Bollocks. The US could build rockets if it wanted to. The US used to spend 6% of GDP on the military during the cold war. Britain spend 50% of GDP on the military during the second world war.
The Iraq and Afghanistan wars are small drops in the ocean compared to such ventures.
Also, remove 100 billion $ from the trial lawyers.
And drill, baby, drill!
It could also have done as Harding did in 1920-21 recession. He cut the budget in half between 1920-22. And the national debt by 1/3. The result turned out to be the roaring 20-ies. The recession disappeared so quickly that nobody remembers it now.
http://ezinearticles.com/?Warren-G-Harding-and-the-1920-Depression---Learning-the-Right-Lesson&id=3121606
During the space race, 400 000 people in the US worked on the Apollo project.
It's really simple folks: The first group of men and women (all paired up to have families) will NEVER be allowed to return to Earth. Their children (born on Mars) will NEVER be able to visit Earth, but if their children's children are fine and everything is handled properly, they may one day visit Earth. It's simple like I said: Bad things are going to happen, some of which will be genetic/virus/bacteria/etc related. Until the teams solve these problems, have a periodic drop of a couple or two (meaning a couple ready to start a family but have good technical know-how to contribute to the colony) every 2-5 years to keep testing the waters, blend it all together with the creation of vaccinations and the like, we are not going anywhere...
Still, as far as radiation goes, people coming from areas of high background radiation, such as India
India has a traditionally high population density. You need to find a better example that doesn't have enormous alternate factors for explaining disease resistance.
You don't need "one" spacecraft with a big diameter. You could use a small one with a counterweight on a tether.
That counterweight would of course be made up of something useful like solarpanels, watertanks etc
Dude, the immune system does nothing to combat radiation or radiation damage. What the hell are you talking about?
The immune system also does nothing to prevent claw-hammers, crowbars, drunkenness, or stupid human tricks.
Radiation and physical damage can compromise immune response, but they don't enhance it.