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Historic Black Hole Merger Discovered: 225 Solar Masses!

7/17/2025

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Summary

Story summary

On November 23, 2023, the LIGO-Virgo-KAGRA Collaboration made a groundbreaking discovery by detecting the largest black hole merger to date, named GW231123. This cosmic event involved two massive black holes, weighing 100 and 140 solar masses, merging to create a colossal black hole of 225 solar masses, reshaping our understanding of black hole formation and hinting at a history of earlier mergers.

History

Historical Context

The LIGO observatory's first detection of gravitational waves in 2015 confirmed Einstein's 1916 theory of general relativity, marking a pivotal moment in astrophysics. This discovery involved a merger of black holes with masses of 29 and 36 solar masses. The recent detection of GW231123 on November 23, 2023, with black holes of 100 and 140 solar masses, further advances our understanding of cosmic phenomena.

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Story summary

On November 23, 2023, the LIGO-Virgo-KAGRA Collaboration made a groundbreaking discovery by detecting the largest black hole merger to date, named GW231123. This cosmic event involved two massive black holes, weighing 100 and 140 solar masses, merging to create a colossal black hole of 225 solar masses, reshaping our understanding of black hole formation and hinting at a history of earlier mergers.

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