Comments by "William Warren" (@wbwarren57) on "Těžkosti s nulovou gravitací při cestě na Mars" video.

Long-term effects of 1/3 gravity? Has anyone done any significant research on the long term affects of 1/3 gravity on the human body? I find it unbelievable that we are Gearing up to spend so much money to go to Mar yet this basic question doesn’t seem to be one that is being adequately researched. The human body is not a linear system. We know that the human body cannot withstand zero gravity for extended periods of time such as year without staining irreversible damage. Why do we think that One third gravity would be OK? It might be just as bad as weightlessness. It might be the case that only when you reached three-quarter’s gravity does the human body adjust without suffering severe damage over long periods of time. If this turns out to be the case, Mars may be completely useless for human colonization. We just don’t know and there’s no excuse for that.
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@lilaclizard4504 Thanks for your note. I agree with you about Venus. My concern is that even though we have had the ISS available for years, no mouse studies on the minimum amount of apparent gravity needed to keep them health - and able to return to Earth eventually - seem to have been done nor have I found info on plans for such studies. If the gravity on Mars and the Moon cannot keep people healthy, then we shouldn't go there.
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@lilaclizard4504 Good points. I think that you are right - based on the situations you describe, NASA, ESA, SpaceX, Blue Origin, and others don't want to do studies on the ISS on this issue because they do know the answers they will get - and they are not good. Unfortunately, I suspect that when they start sending up "space workers" to make money for corporations, the corporations will refuse to help the returning workers with issues resulting from low gravity on the basis that "if only the worker had done their exercises there would be no problems".
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@lilaclizard4504 More good points. When you consider low gravity dangers along with the costs, time, and probable impossibility of terraforming, the only viable space colonization approach I see are rotating O'neill cylinders that can be terraformed like a garden and spun up to provide 1G apparent gravity.
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@KohuGaly - I agree totally. You could do this research quite cheaply (as these things go) on the ISS by keeping mice in a rotating habitat of 2 meters diameter rotating at less than 20 RPM. Wouldn't have to weigh much nor take up much room or time of the astronauts.
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KohuGaly Thank you. You have express that point I was trying to make much more clearly.
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David Wührer Fantastic! Where do I sign up?
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Real deal The human body is not a linear system. Just because you might know what happens with micro G and you know what happens in 1G, you really don’t know what happened in the middle unless you test it.
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