Core Insights - The Event Horizon Telescope (EHT) collaboration has released new images of the supermassive black hole at the center of the M87 galaxy, revealing the evolution of polarized radiation over time [1][2] - This research provides new perspectives on the physical processes in the extreme environment surrounding black holes, with significant findings published in the journal "Astronomy and Astrophysics" [1] Group 1 - The M87 galaxy is approximately 55 million light-years away from Earth, with its central black hole having a mass over 6 billion times that of the Sun [1] - The EHT is a global network of radio telescopes that effectively functions as a telescope the size of Earth, with the first black hole image released in 2019 based on data from 2017 [1][2] - The study compared observational data from 2017, 2018, and 2021, leading to important advancements in understanding the variability of the black hole's magnetic field [1][2] Group 2 - Between 2017 and 2021, the polarization direction of the black hole's magnetic field underwent a significant reversal, indicating a dynamic environment influenced by both internal magnetic structures and external effects [2] - The upgraded observational capabilities of the EHT, including the addition of the U.S. Kitt Peak Telescope and the French NOEMA array, have enhanced sensitivity and allowed for the first successful constraints on the radiation direction at the base of the relativistic jets [2] - The high-energy jets from supermassive black holes like M87 are crucial for galaxy evolution, regulating star formation and distributing cosmic energy, thus serving as a "natural laboratory" for studying extreme physics [2]