Post Mission Bone Fractures

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Bone: When astronauts go on to a long-term space mission and remain in the reduced-gravity environment for a long time, there are some potential harmful influence to the bones, which include bone lose, accelerated loss of bone minerals and increased chances for renal stones. It is also notifiable that reduced-gravity environment can, to some extent, give rise to possible post mission bone fractures. There are some evidence and background to prove that there is strong correlation between space flight and bone abnormality. First, it is noticed that bone loss accelerated for an astronaut. The amount of bone loss for an astronaut in a single month, which is about 1 to 1.5 percent, is equal to that for a postmenopausal women who did not receive…show more content…
It can also jeopardize the functional performance when adapting to a novel gravitational environment in an acute phase. Some researches have indicated the changes in manual control, visual performance, spatial orientation and gait control after space flight missions, and the greatest changes usually happen immediately after the astronaut experience gravity transition. Also, it is shown that the longer the time of the flight is, the larger possibility of post flight disturbances…show more content…
However, it is very hard to achieve the perfect outcome although there are several methods to accomplish it. One way to achieve it is to build a doughnut-shaped habitation section which can be used to offset the effect of gravity by rotating the spaceship which will provide a force pushing them away from the center of rotation. However, there are several aspects that need to be taken into consideration. First is that there has to be a source of energy to make the spaceship rotate in the first space. Second, for those nonrotating parts, the friction will slow the rotation unless there is more energy input. Third, such hypothesis is built on the possibility of building a very large spaceship with large radius, which can be a big engineering challenge. Moreover, as the force generated is proportional to the radius of the rotation and to the square of the rotation speed, for instance, to rotate at 1 rpm requires a radius of 900m, the energy needed to maintain such rotation and rotation speed can be tremendous and the structure also has to be strong enough to withstand such high-speed rotation. The second possible solutions is by acceleration which is based on Einstein’s General Theory of Relativity that gravity and acceleration are equivalent. Theoretically, if a spaceship can
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