In the future, human education will step into space and enter the era of interstellar colonization, and our first step may be the moon, Mars and space station.
We know that the gravity of the moon is only 0.1 times that of the earth, and that of Mars is only 0.3 times that of the earth. What impact will the long-term survival in this low gravity environment have on human beings?
Human beings have done experiments on the reproduction of fish, frogs and laboratory mice on the space station. The result is that fish and frogs can reproduce healthily under microgravity, while laboratory mice may have problems. In the simulated microgravity environment on the ground, there are cases of infertility in laboratory mice.
The results show that microgravity has little effect on the reproduction of fish and frogs, but it may affect the reproduction ability of mammals. And man is the highest mammal.
In addition, low gravity environment will have a huge impact on the human brain. In zero gravity environment, astronauts’ faces will be red and swollen, which is called “Charlie Brown effect” or “big head bird leg syndrome”. As the fluid from blood and cerebrospinal fluid flows to the brain, an astronaut’s face becomes swollen and his legs become thinner.
In addition, the Charlie Brown effect can lead to space motion sickness, headache or nausea. It is quite terrible that the brain of American astronauts who have been working in space for a long time will move up. Astronaut’s intracranial pressure will increase, and accompanied by blurred vision and even affect intelligence, this symptom is known as “visual impairment and intracranial pressure syndrome”.
The longer you live in space, the more obvious the brain changes. In low gravity environment, human bone mineral density is also a more obvious indicator affected. The bone mineral density of healthy young people is 200mg / cm ^ 3. With the growth of age, the bone mineral density will decline. When the bone mineral density drops to 100mg / cm ^ 3, under the gravity of 1g of the earth, fractures will occur.
Therefore, it is very necessary to evaluate the impact of Mars and moon gravity on the decline of human bone mineral density. Moreover, due to the impact of Mars and moon gravity, it is not easy for human to fracture when the bone mineral density is reduced. This will lead to a problem. Due to the relatively high bone mineral density and muscle content of human who just landed on Mars from the earth, in the low gravity environment, the bone mineral density will decrease Like Captain America.
However, in order to adapt to the impact of low gravity, the body’s function will also be slowly lost to adapt to the low gravity environment. At that time, if human beings once again land on the earth, with their own weak body, they are likely to be unable to support the earth’s gravity and fracture. Adapted to the Martian environment, you are on earth like carrying sandbags all over the body.
What can be done to resist the health threat of low gravity environment?
If astronauts want to stay in space for a long time, such as working on the international space station, or on Mars or the moon, they need to spend at least two hours a day exercising. Through treadmill, spring tension device and other exercise methods, astronauts can try to reduce the speed of their muscle atrophy, so that bone loss is not so serious.
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