Difference between revisions of "Partial G Health Experiment"

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'''The mission: research the long term impact of partial gravity on human health.''
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The mission: research the long term impact of partial gravity on human health.
  
 
* What is the impact of partial gravity on human health?
 
* What is the impact of partial gravity on human health?
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== Introduction ==
 
== Introduction ==
  
The impact of zero gravity on human health has been studied for decades on Russian and US space stations. We know the human body needs gravity to stay healthy, but nobody knows how much gravity is needed.  We need research on the health impact of long term living in partial gravity environments, especially the 0.15G on the Moon and 0.4G on Mars.
+
The impact of zero gravity on human health has been studied for decades on Russian and US space stations. We know the human body needs gravity to stay healthy, but nobody knows how much gravity is needed.  We need research on the health impact of long term living in partial gravity environments, especially the 0.17G on the Moon and 0.4G on Mars.
  
 
One way to test the long term impact of lower gravity on the human body would be to set up stations on the Moon and Mars and have people live there for a long time.  However, this is very expensive and could be dangerous - sending people to another planetary body without the right exercise equipment could seriously impact their health.
 
One way to test the long term impact of lower gravity on the human body would be to set up stations on the Moon and Mars and have people live there for a long time.  However, this is very expensive and could be dangerous - sending people to another planetary body without the right exercise equipment could seriously impact their health.
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* Astronauts could be brought back to earth quickly if health problems come up.
 
* Astronauts could be brought back to earth quickly if health problems come up.
 
* The gravity on a space station can be adjusted, so various levels of gravity can be tested in one laboratory.
 
* The gravity on a space station can be adjusted, so various levels of gravity can be tested in one laboratory.
* It may be possible to assemble the space station from available components and launch it with "commodity" launchers.   
+
* As usual the equipment would require expensive launch on rockets to orbit, but the cost of design and fabrication for things launched into orbit is usually a number of times greater than the launch costs .   
  
The impact of the last item cannot be underestimated.  If an experiment like this is too expensive, it will not be done.  However, if it can be designed "on the cheap", it may be possible to get the funding required to carry out the experiment.  Using off the shelf components as much as possible could greatly reduce development and launch costs.
+
The impact of the last item cannot be underestimated because the lowest estimate that could be made is likely to be greater than the impact of the experiment as a whole.  If an experiment like this is too expensive, it will not be done.  However, if it can be designed privately at no cost whatever to the government and offered freely to NASA, it is still unlikely to be done.  Using off the shelf components as much as possible could reduce development costs but is likely to increase launch costs by resulting in a heavier experiment package.
  
== Concept ==
+
 
 +
===Concept===
 +
<sub>See Also: [[Partial G Todo]]</sub>
 +
 
 +
The details involved in a partial gravity health experiment are being discussed in IRC chat room <ref>in irc.freenode.net in #space</ref>.
  
 
Initial back-of-the-envelope idea:
 
Initial back-of-the-envelope idea:
 
* Modify a large [[Bigelow Inflatable Space Station]] so it can be rotated to simulate partial gravity.
 
* Modify a large [[Bigelow Inflatable Space Station]] so it can be rotated to simulate partial gravity.
 
* Launch the equipment and crew on [[SpaceX Rockets]].  Chances are those will be ready before this experiment has been fully planned.
 
* Launch the equipment and crew on [[SpaceX Rockets]].  Chances are those will be ready before this experiment has been fully planned.
 +
== Urgency ==
 +
There is no need to have this experiment done before establishing a robotic colony on Luna.  Once robotic industry is established one g gravity can be provided if it is found to be necessary.  A centrifuge can be constructed on the Moon out of lunar materials to provide for the health of personnel that maintain the base. 
 +
== Publicity ==
 +
If such an experiment is undertaken by NASA it is likely to incite claims that NASA is just making busy work to justify the large appropriations rather than attempting to accomplish anything.  Indeed such claims are already made and this would be another case of a program going in circles and getting nowhere. 
  
By using off the shelf components, the budget for infrastructure development can be kept to a minimum.  Getting maximum science return per dollar is the only thing that can make this kind of experiment feasible.
 
 
== Community involvement ==
 
 
Figuring out all the details involved in a partial gravity health experiment is a lot of work.  If you have the time and/or knowledge to "fill in the blanks" in our outline, feel free to do so.  If you want to discuss the experiment feel free to join us on irc.freenode.net in #space.
 
 
We also have a todo page on [[Partial G Todo]]
 
  
 
== Experiments ==
 
== Experiments ==
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The primary [[Partial G Experiments]] will be focussed on the impact of partial gravity on human health.
 
The primary [[Partial G Experiments]] will be focussed on the impact of partial gravity on human health.
  
Secondary research objectives should focus on areas that are not adequately studied on the ISS, for example space agriculture.
+
Secondary research objectives should focus on areas that are not adequately studied on the [[ISS into the Pacific|ISS]], for example space agriculture.
  
 
== Space Station ==
 
== Space Station ==
 +
In order to simulate partial gravity, the space station will need to rotate or contain a large centrifuge.  A rotating space station needs to be of a sufficiently large diameter or consist of components mounted in a "dumbbell" arrangement.
  
In order to simulate partial gravity, the space station will need to rotate.  To make that happen, either the space station needs to be of a sufficiently large diameter or consist of several components mounted in a "dumbell" arrangement.
+
A current idea is to modify a Bigelow inflatable space station by assembling a floor from smaller rigid components inside the inflatable walls.  See [[Partial G Space Station]].
 
 
The current idea is to modify a Bigelow inflatable space station by assembling a floor from smaller rigid components inside the inflatable walls.  See [[Partial G Space Station]].
 
  
 
== Launches ==
 
== Launches ==
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== See Also ==
 
== See Also ==
  
*[[List of Offworld Medical Risks]]
+
*[[Partial G Cost Estimates]]
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*[[Partial G Experiments in the Past]]
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*[[Partial G Launch Vehicles]]
 +
*[[Partial G Space Station]]
 +
*[[Partial G Todo]]
 +
 
 +
== References ==
 +
<references/>
  
 
[[Category:Life Support]] [[Category:Partial G Health Experiment]]
 
[[Category:Life Support]] [[Category:Partial G Health Experiment]]

Latest revision as of 11:11, 15 November 2010

The mission: research the long term impact of partial gravity on human health.

  • What is the impact of partial gravity on human health?
  • How much gravity does a human body need to stay healthy?
  • What kinds of exercise are needed to keep the human body healthy at partial gravity?
  • How much exercise is needed to keep the human body healthy at partial gravity?
  • Specifically: what is the health impact of Moon and Mars gravity?

Introduction

The impact of zero gravity on human health has been studied for decades on Russian and US space stations. We know the human body needs gravity to stay healthy, but nobody knows how much gravity is needed. We need research on the health impact of long term living in partial gravity environments, especially the 0.17G on the Moon and 0.4G on Mars.

One way to test the long term impact of lower gravity on the human body would be to set up stations on the Moon and Mars and have people live there for a long time. However, this is very expensive and could be dangerous - sending people to another planetary body without the right exercise equipment could seriously impact their health.

Testing the impact of partial gravity on human health in low earth orbit has several advantages:

  • Astronauts could be brought back to earth quickly if health problems come up.
  • The gravity on a space station can be adjusted, so various levels of gravity can be tested in one laboratory.
  • As usual the equipment would require expensive launch on rockets to orbit, but the cost of design and fabrication for things launched into orbit is usually a number of times greater than the launch costs .

The impact of the last item cannot be underestimated because the lowest estimate that could be made is likely to be greater than the impact of the experiment as a whole. If an experiment like this is too expensive, it will not be done. However, if it can be designed privately at no cost whatever to the government and offered freely to NASA, it is still unlikely to be done. Using off the shelf components as much as possible could reduce development costs but is likely to increase launch costs by resulting in a heavier experiment package.


Concept

See Also: Partial G Todo

The details involved in a partial gravity health experiment are being discussed in IRC chat room [1].

Initial back-of-the-envelope idea:

Urgency

There is no need to have this experiment done before establishing a robotic colony on Luna. Once robotic industry is established one g gravity can be provided if it is found to be necessary. A centrifuge can be constructed on the Moon out of lunar materials to provide for the health of personnel that maintain the base.

Publicity

If such an experiment is undertaken by NASA it is likely to incite claims that NASA is just making busy work to justify the large appropriations rather than attempting to accomplish anything. Indeed such claims are already made and this would be another case of a program going in circles and getting nowhere.


Experiments

The primary Partial G Experiments will be focussed on the impact of partial gravity on human health.

Secondary research objectives should focus on areas that are not adequately studied on the ISS, for example space agriculture.

Space Station

In order to simulate partial gravity, the space station will need to rotate or contain a large centrifuge. A rotating space station needs to be of a sufficiently large diameter or consist of components mounted in a "dumbbell" arrangement.

A current idea is to modify a Bigelow inflatable space station by assembling a floor from smaller rigid components inside the inflatable walls. See Partial G Space Station.

Launches

To save costs, only off the shelf launch vehicles will be used: Partial G Launch Vehicles.

Cost estimates

Unlike zero gravity workshops, which are used for all kinds of experiments, the partial gravity research laboratory is useful only for a smaller set of experiments. To put it bluntly, costs will need to be lower.

In order to ensure that constraint, the Partial G Cost Estimates page will be used to track cost estimates during every phase of planning the experiment.


See Also

References

  1. in irc.freenode.net in #space