According to slashgear, a foreign media report, black holes are known as “greedy” and inescapable, and are the most impressive elements in the known universe. However, people have not realized until now that they will “rock”. The University of Chicago’s new study uses a unique array of telescopes to track the supermassive black hole at the center of M87, and in the process unravels a new discovery – and a new mystery. < / P > < p > more than a year has passed since the event horizon telescope (EHT) collaboration released images of black hole M87 *. However, the data collected on this very massive object are actually earlier than that, and there are archives from 2009 to 2013. < / P > < p > earlier data is only part of the data because it relies on the first telescopes to join the event horizon array. It’s not so much a single instrument as a collaboration of 13 institutes and independent telescopes that combine their own data from different perspectives. By applying the latest analytical techniques to these old data, researchers have been able to extract new details about M87 * and what it is doing. < / P > < p > “last year we saw images of black hole shadows, consisting of a bright crescent and a dark central part formed by a hot plasma spinning around M87 *, and we expect the event horizon of the black hole to be there,” said maciek wielgus, an astronomer at the center for Astrophysics and lead author of the paper detailing the new findings. “But these results are only based on observations made over the whole week window in April 2017, which is too short to see many changes.” The data for 2009-2013 are from a prototype array, but the application of statistical modeling is sufficient to illustrate how M87 * has changed over time. On the one hand, it confirms some existing theories. For example, the shadow diameter of a black hole coincides with Einstein’s general theory of relativity. But it also unravels some of the surprises. Although the size of the crescent ring may be the same as predicted by theory, it is unexpected that there is obvious shaking. < / P > < p > some of them are predicted by current theories, because the accretion stream of superheated gas falling on the black hole will ionize and then become turbulent due to the magnetic field. The scientists explained that this could explain some of the visible “wobbles,” but not all of them. “In fact, we see quite a lot of variation there, and not all theoretical accretion models allow that much shaking,” wielgus suggests. “This means that we can start to exclude some models based on the observed source power.” < / P > < p > scientists hope that the 2018 data currently being processed will shed more light on the details of this wobble and what might have caused it to reach such a level. At the same time, data collection will begin again in March 2021 – observations in 2020 have been shelved due to weather patterns, ongoing new crown pandemics and other factors, from which scientists expected to gather more details about how black holes evolved. Didi Qingju bicycle has entered 150 cities