How do the biggest black holes in the universe form? Ripples in spacetime provide a clue
AI-summarised brief · reviewed before publication
Scientists discovered massive black holes may form in dense stellar environments, such as globular clusters, where violent collisions are common. They studied ripples in spacetime, or gravitational waves, detected by LIGO, KAGRA, and Virgo. The team analyzed 153 black hole merger detections, revealing two distinct populations of black holes. One population formed from massive star collapses, while the other formed via hierarchical mergers in dense star clusters, indicating a chaotic origin for cosmic titans.