The discovery has important implications for space flight
In July 28, Beijing science and technology daily (reporter Zhang Mengran) 28, published in the British "nature" magazine's "science report" a journal of physiology studies show that, compared with the implementation of near earth orbit astronauts or has never been performed orbit astronaut, Appollo participated in the risk of cardiovascular disease, the astronauts more. This discovery has important implications for space flight beyond the earth's protective magnetosphere.
"Appollo" is the United States from 1961 to 1972 the implementation of a series of manned lunar missions, a total of 6 manned lunar landing, there have been 12 astronauts to inspect the moon, is of epoch-making significance in the history of world space. As of now, except for the "Appollo" program, all manned space flights are carried out in the near earth orbit, which means that the earth's magnetic field blocking the role of cosmic radiation still exists. Therefore, it has been widely accepted that near earth orbit missions or short-term lunar missions will not increase the long-term risk of cardiovascular disease in astronauts.
This time, Michael Delp and his colleagues at Florida State University in the United States, through the comparison of the 7 Appollo Apollo astronauts, 35 astronauts perform other space missions and the other 35 without the shuttle astronaut's death, on the fly affect the earth's magnetic layer on health may cause. The authors found that the mortality rates of cardiovascular diseases in Appollo astronauts were almost 5 times higher than those of astronauts and near earth orbiting astronauts who did not carry out the mission.
To test the underlying mechanism behind these findings, the authors also conducted experiments on 44 male rats to study the long-term effects of simulated weightlessness and radiation associated with space on the vascular system. The results showed that the effects on the vascular system were mainly radiation, irrespective of weight loss. Therefore, the authors point out that radiation induced damage to vessel wall cells may be a major cause of cardiovascular disease in astronauts.
Chief editor punctuate
When designing the future manned space mission, one of the most terrifying threats in the universe is cosmic rays consisting of high velocity elementary particles. The radiation is serious enough to cause cancer if you travel long distances. As we all know, the next human conquest of Mars, the next target of conquest, may last about two and a half years. If the problem cannot be solved before its mission, it may become the biggest obstacle for humans to reach other major planets in the solar system