For the first time, China’s chang’e-4 has measured the radiation on the lunar surface in detail, and found that it is safe for human exploration. This result gives researchers a better understanding of how much protective shielding will be needed by future workers. Scientists found that staying on the surface of the moon for two months exposed the same amount of radiation as five months on the international space station. < / P > < p > in the 1960s and 1970s, Apollo astronauts carried dosimeters to measure their radiation, but these devices recorded their total radiation over their entire journey, not just their time on the surface of the moon. Therefore, scientists have to estimate the radiation dose of astronauts on the surface of the moon according to the extrapolation method and model, so they have been waiting for the new lunar lander to bring direct measurement of the surface radiation. < p > < p > the China chang’e-4 probe, which landed in January 2019, now provides more detailed data. The new study points out that the radiation exposure of astronauts on the moon will be 200-1000 times more than that of us on the earth, 5-10 times more than that of people sitting on the transatlantic plane. The average daily radiation exposure is 1369 microsevers, which is 2.6 times higher than the average daily radiation exposure of 523 microsevers in the international space station. The detector was designed by Wimmer Schweingruber and his colleagues in China and Germany and published in science The device measures hourly emissivity, and its location inside the chang’e-4 probe provides partial shielding, just as astronauts’ spacesuits would do to their bodies, so the findings are suitable for human explorers, the report said. < / P > < p > more importantly, the researchers calculated that a lunar base covering at least 50 cm of lunar soil would be enough to protect them. A deeper cabin shielded by about 10 meters of water would be enough to withstand occasional solar storms, which can cause radiation levels to skyrocket. Global Tech