The study confirms for the first time the existence of nanoflares and helps to explain why the temperature of the corona is thousands of times that of the sun’s surface. Excerpts are as follows: < / P > < p > when astrophysicist Patrick Antoine first observed a tiny jet explosion in the corona, he didn’t know what it meant. “I was shocked by the images,” Antoine said. Intuition told me they were important, but I couldn’t concentrate on them at the time. I put the photos in the filing cabinet and accumulated dust for three years. ” Antoine is the lead author of a recent study published in the British journal Nature astronomy, which is the first to confirm the existence of nanoflares and help explain why the temperature of the corona is thousands of times that of the sun’s surface. < / P > < p > Antoine made observations as early as 2014 when it checked the satellite catalog of the solar interface imaging spectrometer, but it was not until 2017 that they had the opportunity to analyze them in detail. In a series of images reconstructed by Antoine, three distinct stages of the transformation of magnetic energy into heat and heating of the corona were observed for the first time. First, you can see a small part of the cold corona, which is about 60000 degrees Celsius. A small explosion that releases energy can then be observed. Because of its shape like a high-speed aircraft, Antoine named it “nanojet stream”, and physics called it “nanoflare”. Finally, it can be confirmed that a small part of the corona, which is initially in a cooling state, rises to millions of degrees Celsius. According to Antoine, the occurrence of such incidents is very accidental and the occurrence area is very small. “It takes a lot of luck for the satellite to aim at the right place at the right time.” Antoine said. Through the analysis of the images, it can be found that the “nano jet” appears in less than 10 seconds, and its speed can reach 700000 km / h. The energy released by each micro explosion is equivalent to 2000 Hiroshima. “We observed an” avalanche effect “in which a small fraction of the nanojet first appeared and then spread over the entire magnetic ring and was captured by satellites,” Antolin said. We observed 150 micro explosions in 10 minutes ADAR Ortiz cavonelli, a researcher in solar astrophysics at the University of Oslo in Norway, said the discovery was important to uncover the secrets of the corona. “As early as the 1980s, it has been proposed that nanoflares are the cause of coronal warming, but they have not been observed. One is theory, the other is practice. ” “We’ve seen light in the corona before with X-rays, but it really hasn’t been able to relate them to the warming of the corona rings,” cavanelli said On the same day, NASA recognized the value of the study. “The researchers reported the first clear images of nanojets, the subtle and bright light produced in the magnetic structure of the corona,” NASA said in an article. This process confirms the existence of nanoflares and helps to explain the phenomenon of coronal warming However, Antoine, cavanelli and NASA researchers agree that more similar observations are needed to unravel the mystery of coronal warming. “More research is needed to determine the frequency of nanojets and nanoflares across the sun, especially how much energy they contribute to coronal warming,” NASA said Cavalnelli said solar physicists agree that there is not only one heating mechanism in the corona, but multiple mechanisms coexist. “We haven’t completely solved the coronal problem, but we’ve taken a very important step,” cavalnelli said (compiler / Liao Siwei) < A= target=_ blank>Didi Qingju bicycle has entered 150 cities