Recently, there is a news that has ignited the scientific circle in China, that is, China will explore Mars for the first time in 2020, and it is also a three in one exploration mission, including Mars orbiting satellite, Mars lander and Mars rover. This is a joint exploration mission between heaven and earth, surpassing the exploration of Mars by other countries at one stroke. You know, when NASA first explored Mars, it only launched an orbital probe, and then it slowly launched a Mars rover. China’s Mars exploration mission next year is in place in one step, which is terrible for China.
The news of China’s first exploration of Mars in 2020 once again makes Mars exploration a hot scientific topic recently. Some friends may have such a question: human exploration of Mars has been half a century, and the probes are more and more advanced. It is reasonable that human should be able to send astronauts to Mars for field exploration now, but why hasn’t the manned landing been realized now What about Mars?
In fact, many people think that manned landing on Mars is too simple. Scientists say that we can not achieve manned landing on Mars now. Why? There are many reasons, one of which is the unknown risk of cosmic radiation to astronauts. As we all know, the cosmic environment is not like the earth, it is a vacuum environment, and there are lethal cosmic radiation.
Mars is relatively far away from the earth. It takes almost seven months for a spacecraft to go to Mars. During the journey to Mars, astronauts may receive 700 times more cosmic radiation than the earth residents. We know very little about cosmic radiation now, and we still don’t know how serious the impact of space radiation on human health is.
In addition to the high cosmic radiation damage for up to seven months during the journey to Mars, the time for astronauts to perform the mission after landing on Mars will not be short. The environment of Mars can not protect the safety of astronauts, and will still be damaged by the high amount of cosmic radiation. The environment of Mars is different from that of the earth. Because of the protection of the thick atmosphere and strong magnetic field, the earth can keep most of the cosmic radiation out and will not cause too much radiation damage to the life of the earth.
Mars has no magnetic field, and the atmosphere is very thin. In such an environment, cosmic radiation will also drive straight into Mars, causing unknown radiation damage to astronauts. Moreover, it will take at least two years for astronauts to go to Mars to carry out a mission, from the start to the completion of the mission, and then back to earth. For such a long time, they will suffer about 700 times of cosmic radiation, which can be ignored It can bring great harm to the health of astronauts.
Radiation physicists said that the amount of radiation in space in one day is equivalent to that on earth in one year. The mission to Mars will take several months to complete. According to the current situation, under the influence of radiation, human beings can not go to Mars. What are the health effects of cosmic radiation on astronauts?
Through preliminary research, scientists believe that in the long-term space mission, cosmic ray bombardment will increase the risk of astronauts suffering from cancer, cause damage to the brain, central nervous system and heart, and then lead to a variety of degenerative diseases. In addition, it has been reported that the proportion of early-onset cataract among astronauts is higher, and the recent twin study by NASA shows that radiation exposure can lead to DNA damage and corresponding gene expression changes, and the resulting health risks can also be passed on to future generations.
Even on the international space station, the radiation dose to the astronauts is 200 times that of the airline pilots or radiology nurses. Therefore, the astronauts of the space station will work in rotation. After performing a mission in space for a period of time, they will return to earth and recuperate for a long time before they can go to space again. Yang Liwei, China’s first astronaut to enter space, only carried out a mission in space, and never went to space again. The main reason is that his body has been greatly affected in space, and the main influence is brought about by space radiation. Therefore, it took at least three years for him to recover.
It can be seen that cosmic radiation does great harm to astronauts, which is also the main reason why human beings are unable to carry out manned landing on Mars. Even if the future space technology is more developed and more advanced aircraft can safely land on Mars, it is difficult to achieve manned landing on Mars if the impact of cosmic radiation on astronauts cannot be really solved.
To solve the problem of cosmic radiation, it is mainly in materials. Scientists are actively studying and exploring a kind of material that can reflect or absorb cosmic radiation. As long as this kind of material can be realized, the problem of cosmic radiation damage to human body will be solved for the most part. We can integrate this material into the manufacture of the spaceship, or coat the outer shell of the spaceship with this material, then the cosmic radiation cannot enter the interior of the spaceship, and naturally it will not cause radiation damage to the astronauts in the spaceship.
At the same time, astronauts integrate this kind of material. When astronauts perform missions in space, they will also block the cosmic radiation, and the human body will not be harmed by the mission radiation. There is another way to solve the cosmic radiation, that is to create a simulated magnetic field. The earth can be protected from cosmic radiation, and the strong magnetic field plays an important role.
So, can we also simulate and create a strong magnetic field around the spacecraft, which is used to distort and block cosmic radiation. No matter what method is used to solve the problem of cosmic radiation in the future, as long as it can be solved, the road of human space exploration will be really opened. We can not only land on Mars and establish a base on Mars, but also explore the universe outside the solar system by going out of the solar system.
If human beings have not solved the problem of cosmic radiation, then we will not be able to stay in space for a long time, landing on Mars is unlikely, let alone exploring out of the solar system. Moreover, the future human interstellar migration plan will need to experience a long time in space, which may be decades, hundreds of years, or thousands of years.
In such a long time, if the spaceship can not effectively resist the cosmic radiation, human beings may have all kinds of health problems in the long journey, and even make human DNA mutation, causing permanent unknown damage.
Guys, what do you think of this? Welcome to leave a message below to discuss and express your opinions.