US EditionScientists Record a Black Hole Collision They Weren’t Sure Was Possible
WASHINGTON AND LOUISIANA, JUL 16 – The merger produced a black hole about 225 times the Sun's mass, doubling the previous record and challenging existing black hole formation theories, scientists said.
- On November 23, 2023, the Laser Interferometer Gravitational-Wave Observatory detected a merger forming a 225-solar-mass black hole about 10 billion light years away.
- A July 13, 2025 arXiv.org estimated progenitor black holes of about 103 and 137 solar masses, highlighting the 64–130 solar mass 'mass gap'.
- Record-Setting event prompts conference showcase, with findings to be presented at the GR-Amaldi meeting in Glasgow, July 14th to 18th, 2025.
- The European Space Agency plans to launch the Laser Interferometer Space Antenna in 2035, which will probe new regimes of gravitational waves.
15 Articles
15 Articles
The resulting black hole is 225 times the mass of the Sun. The colliding black holes were also remarkably massive.
Cosmic Heavyweights Collide – LIGO Detects Largest, Fastest-Spinning Black Holes Yet
A gravitational wave has revealed the biggest black-hole merger ever recorded—so massive and extreme, it defies current astrophysical models. The clash formed a 225-solar-mass monster, possibly made from black holes that had already merged before. Einstein’s rules may need revisiting. Record-Breaking Black Hole Collision The LIGO-Virgo-KAGRA (LVK) Collaboration has observed the most massive black hole [...]
The Most Massive Black Hole Merger Ever
Astronomers using the LIGO-Virgo-KAGRA gravitational wave detectors announced the most massive black hole merger ever seen. Two black holes crashed together, producing a final black hole with approximately 225 times the mass of the Sun. Designated GW231123, it was detected during the 2023 observing run, and appears to be from the collision of 100- and 140-stellar-mass black holes. Black holes this massive are hard to get through standard stellar…
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