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Science and Technology "Somewhere, something incredible is waiting to be known." - Carl Sagan.

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Old May 29 2009, 10:46 PM   #16
Myasishchev
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Location: America after the rain
Re: Strong gravity

DS9Sega wrote: View Post
Meredith wrote: View Post
I know people who already weigh 2x times as much as they should and they don't have any problems getting around. It would be like serious weight training with weights on all of the time. I think 2X gravity would be livable, though it would either strain your heart, or you would have really good cardio health because of it!
Weighing twice as much as you should isn't the same as the increased acceleration of higher gravity, which means impacts are more severe, etc.
At the very least, it would be an issue going immediately from Earth to a 2G planet. People who weigh 320 pounds didn't gain the surplus 160 overnight. Their muscles were conditioned to accept the extra weight incrementally.

Forgetting the other circulatory effects for a moment, I wonder what effects even comparatively slight increases in gravity (2, 3Gs) for extended periods would have on air pressure. Would going back immediately to a 1G environment cause problems, i.e. bends and such?
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Old May 29 2009, 11:23 PM   #17
Daedalus12
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Re: Strong gravity

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Out of my curiosity..how does that effect strong gravity on humans on other planets? Could we possible to survive on other planets with strong gravity or not?

I could see tons of potential physiological damages which can result from stronger gravity. We have already have a large knowledge base of physiological damages resulting from experiencing micro-gravity. Skylab was the first to provide extensive data on that subject. I am sure the physiological deterioration resulting from stronger gravity will just as broad and extensive as it is for low gravity.



Source: Human Physiology in Space, BioEssays 1996 Volume 18 Issue 12.
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Old May 30 2009, 07:29 PM   #18
Christopher
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Re: Strong gravity

oponda2009 wrote: View Post
Gravity dictates the orbits of the planets around the sun. By measuring those orbits, you can calculate the planet's gravity.
No, that's not true at all. The mass, and therefore the gravitational pull, of a planet (unless it's a giant planet) is so infinitesimally small compared to that of its primary star that it basically goes to zero in the equation. The only significant factors defining a planet's orbit are the mass of its primary star and its distance from that star.

A planet's surface gravity is calculated from its own mass and radius. Its orbital parameters have nothing to do with that computation.


Here on earth, we have a normal gravitational force.
No, here on Earth we have an Earth-sized gravitational force. We think of that as "normal" because it's what we're used to, but there's nothing intrinsically more "normal" about Earth's gravity than that of any other body.
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