黑洞研究又有新发现！

Core Insights - The "Tian Guan" satellite (Einstein Probe Satellite) captured an unprecedented high-energy cosmic explosion, which exhibits significant differences in brightness variation, radiation rhythm, and spectral characteristics compared to any known explosions [1][2] - The event, designated as "EP250702a," was observed on July 2, 2025, and involved a bright and rapidly changing X-ray source, leading to a global collaborative observation effort [1] Summary by Sections - Event Characteristics - The explosion occurred billions of light-years away, displaying multiple bursts of high energy with rapid and complex changes in brightness and energy spectrum, which cannot be fully explained by existing astronomical event models [2] - The rapid decay in brightness, dropping over 100,000 times within twenty days, suggests the involved celestial body is a dense white dwarf, indicating a medium-mass black hole tearing apart and consuming it [2] - Scientific Implications - This event may provide the first clear evidence of such a process, aiding in the understanding of medium-mass black holes, their growth, the ultimate fate of dense celestial bodies, and opening new avenues in multi-messenger astronomy [2]