Will human beings be trapped on earth forever? Scientists: changes in the structure and function of astronauts’ brains

I believe that many friends have a dream, that is, hope to be able to travel in the universe like astronauts one day in the future. Although space technology has been developing rapidly for decades, and space technology is becoming more and more mature, it has not really the ability to launch large-scale space travel. However, with the development of technology, space travel may soon be put into action. For example, SpaceX company is studying a “starship”. According to the concept, this kind of spaceship can carry up to 100 passengers to the moon, Mars and other planets. According to the plan, the first batch of space passengers is planned to launch a round the moon trip in January 2023. < / P > < p > if this plan can be carried out smoothly, it may mean that space travel will also begin. Of course, the cost of space travel in the early stage will be very high, so it is impossible to popularize it on a large scale. In addition to the cost, there is also an insurmountable technical problem to keep many people out of space travel. Scientists have studied the changes of astronauts’ brains after long-term space flight, according to a research report published by scientists in. In this study, the researchers studied the brain structure of 11 astronauts who spent an average of 171 consecutive days on the international space station. The researchers performed three diffusion-weighted magnetic resonance imaging of the astronauts, one before flying into space and two after returning to earth. By comparing the brains of these astronauts before and after returning to earth, scientists found some changes in the brains of these astronauts. The results show that in the environment of microgravity and zero gravity for a long time, the distribution of white matter and gray matter of astronauts’ brain has changed, and the ventricles of brain have expanded and cerebrospinal fluid has increased. The reason for this change is that the environment of astronauts has changed after they enter space, and they are faced with weightlessness. Therefore, the nervous system adapts to microgravity and zero gravity environment in this way. < / P > < p > astronauts’ brains have changed. Will we really be trapped on earth? If we human beings carry out space travel in the future, will we space travelers also face the same changes, and what impact will these changes have on us? First of all, the astronauts in this study have been flying in space for a long time, with an average of 171 days, that is, nearly half a year. In the future, the flight time of our space travel may be relatively short. If we fly around the earth, the flight time of a single space travel may be only a few days, so the brain changes should not be obvious. In addition, in microgravity, low gravity environment, although the brain changes, but after returning to earth a few months, these structures will return to normal. After all, the biggest environmental change astronauts face after returning from space may be gravity. In order to adapt to the gravity environment on the ground, the brain nervous system will also make some changes. However, if we launch interstellar flight in the future, this issue may be worthy of attention. Take our future migration to Mars as an example. Due to the rotation period between the earth and Mars, there is only a Mars launch window every 26 months. In addition, it takes us nearly half a year to go to Mars on a one-way trip. Therefore, the time we will be in the microgravity environment during our trip to Mars will be very long. The most important thing is that the gravity on the surface of Mars is about 2 / 5 of the earth’s, which means that after we arrive at Mars, the problem of gravity will still haunt us. In order to adapt to the low gravity environment of Mars, we need to make some adaptive changes to each structure of our body. < p > < p > therefore, Mars is not our ideal second home. The mass of an ideal second home should be similar to that of our earth, and the gravity of the surface of the planet will be similar to that of the earth. Judging from the current exploration situation, it is not generally difficult to find an earth like planet with the same mass as our earth and in a habitable zone. At least up to now, we have not found a planet completely suitable for our habitation. However, there are hundreds of millions of earth like planets in the universe, which does not rule out the existence of some “second homes” suitable for our human existence. Of course, it’s not clear when we’ll be able to go to exoplanets in light years. Iqoo5 series debut strength interpretation of “120 super full mark flagship”

Author: zmhuaxia