Astronauts are people who navigate between stars and are also objects of public attention. Do astronauts on the space station sleep on the air? Will Space Life Change Human Genes? Will astronauts gain weight in space? Is this really the case? Myth 1: In space, due to the high-speed flight of spacecraft around the Earth, a weightless environment is formed, resulting in space station astronauts sleeping on the fly. Analysis: This is not a fact. Floating in a narrow cabin can easily collide with various instruments and equipment, causing danger. Therefore, astronauts need to specifically fix themselves when sleeping. In the early stages of the Shenzhou spacecraft mission, astronauts fixed their sleeping bags inside the cabin and then crawled into them to sleep. Now China's Human spaceflight has officially entered the era of space station. Now astronauts are extremely happy because they have spacious and comfortable independent sleeping areas. There are three independent sleeping areas in China's space station Tianhe core module and Wentian module respectively. The sleeping area of Tianhe core module is set horizontally, the astronauts sleep "lying down", the sleeping area of Wentian module is set vertically, and the astronauts sleep "standing up". However, in weightlessness environment, there is no difference in feeling when sleeping. In the sleeping area, astronauts can flexibly choose the fixing method of their sleeping bags according to their preferences. Some astronauts prefer a more stable and fully fixed method, while others prefer a more free floating feeling, so they adopt a semi fixed method to give the sleeping bags a certain amount of activity space. The designers also thoughtfully set up a porthole for each sleeping area, and if you like, you can always enjoy the beautiful space scenery. Myth 2: There are various types of radiation in the space where the Earth is located, and astronauts live in space for a long time during missions. They escape from the atmosphere, and these cosmic radiation can seriously alter their genes. Analysis: This statement is very one-sided and lacks strong scientific basis. There are indeed many kinds of radiation in the universe, and radiation is also one of the important reasons for inducing gene mutation. But at present, what Human spaceflight can reach in various countries still belongs to "near earth space", and is also protected by the earth's magnetic field. Moreover, spacecraft cabins and extravehicular Space suit will block most of the cosmic rays for them, and researchers will also check the Radiation exposure of astronauts to ensure their health. Genetic mutations provide valuable opportunities for species to adapt to environmental changes, and are also crucial for the survival of existing species on Earth, including humans, to this day. However, for living individuals, genetic mutations are highly likely to have negative effects. Through modern medical research, it is found that radiation is one of the important reasons for inducing gene mutation, and there are ionizing radiation, ultraviolet radiation, radio frequency radiation and other non ionizing radiation environments formed by galactic cosmic radiation, geomagnetic capture radiation and Solar particle event in the space where the earth is located. The problem of astronauts' gene changes in the space environment has always been an important issue of concern to all space powers, and the Radiation exposure received by astronauts has also been monitored in the space station. One of the most representative studies in the world on human genetic changes in space environments is NASA's comparative study of a pair of identical twin astronauts. They're Scott