Researchers from the National Observatory of the Chinese Academy of Sciences and other domestic and foreign institutions, using supercomputers from China and Europe, adopted a new multi amplification simulation technology, and obtained a clear image of the full-scale internal structure of the dark halo in the universe for the first time under the current standard cosmological model. The results were published online in the journal Nature on September 2. < p > < p > about 85% of the matter in the universe is dark matter, which is quite different from the ordinary matter that makes up stars, planets and our human world. These dark matter collapse under the influence of gravity, forming a structure called dark halo. By cooling, the gas of ordinary matter gathers in the center of the dark halo, forming bright stars, galaxies and the whole bright world. < / P > < p > the largest mass dark halo in the universe is a giant galaxy cluster containing hundreds of bright galaxies, whose mass is about one billion times that of the sun. Their properties have been widely studied by astronomers. However, low mass halos are not so lucky. Although they are numerous, human beings know little about them. < / P > < p > “because they remain” dark “throughout the history of the universe, we can only rely on supercomputers to study these dark ultramicro halos by simulating the evolution of the universe.” One of the authors, a researcher at the National Astronomical Observatory of the Chinese Academy of Sciences, said, “in order to study the internal structure of dark halos only the size of the solar system in the context of the whole universe, we have developed a new technology.” < p > < p > with the help of supercomputers, researchers have developed and tested simulation programs and used multiple amplification technology to successfully span 30 orders of magnitude for small mass dark halos. “This super amplification simulation in a typical region of the universe requires the relay of eight” magnifiers. “. It’s as big as finding a flea in a picture of the moon’s surface. ” Wang Jie, the first author and co-author of the paper and a researcher at the National Astronomical Observatory of the Chinese Academy of Sciences, gives an example. < / P > < p > these super magnified simulations enable researchers to reliably and thoroughly study the formation, evolution and internal structure of mass dark halos from earth to super cluster. < / P > < p > “it has been speculated that those small dark halos should be different from the large dark halos we are familiar with. However, it is amazing that all the dark halos have a very similar internal structure, that is, the center is dense, and the outward is gradually sparse, while a large number of smaller dark matter masses surround the relatively outer space.” Wang Jie said that without knowing the scale, it is almost impossible to distinguish between a huge dark halo of galaxy clusters and an ultramicro halo only the mass of the earth. < / P > < p > these new insights into the internal structure of low mass dark halos will allow astronomers to use various tools to detect them, such as gravitational lensing, dynamics and gamma ray bursts monitoring. According to some current theories, a large number of dark matter particles will collide with each other in the dense dark halo center, which will annihilate and produce gamma ray bursts. “Our results predict that a large part of the radiation comes from ultramicro dark halos that are too small to form stars.” “Future gamma ray observations are likely to capture these radiation signals and give us a glimpse of the ‘super Dwarfs’ in the universe,” Wang said. This will help us test the hypothesis about the nature of dark matter – dark matter may not be completely dark as we think it is. ” Google said the proposed media negotiation rules would put its free services in Australia at “risk”