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Merger of two massive black holes is one for the record books

arstechnica.com Unknown 2025-07-30 11:30:23

Physicists with the LIGO/Virgo/KAGRA collaboration have detected the gravitational wave signal (dubbed GW231123) of the most massive merger between two black holes yet observed, resulting in a new black hole that is 225 times more massive than our Sun. The results were presented at the Edoardo Amaldi Conference on Gravitational Waves in Glasgow, Scotland. The LIGO/Virgo/KAGRA collaboration searches the universe for gravitational waves produced by the mergers of black holes and neutron stars. LI

Topics: black gravitational ligo neutron virgo
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Nuclear Waste Reprocessing Gains Momentum in the U.S.

news.ycombinator.com Julia Tilton 2025-08-06 08:28:58

The United States’ 90,000-ton stockpile of radioactive nuclear waste has long been a liability, but researchers are increasingly eyeing it as a resource. New techniques in transforming spent fuel, new nuclear fuel cycle directives from the Trump administration, and the doling out of a Biden-era $40 million research program together aim to repurpose nuclear waste on a commercial scale. In a suite of executive orders announced on May 23, U.S. President Donald Trump directed the U.S. Department of

Topics: fuel neutrons nuclear recycling waste
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Star Quakes and Monster Shock Waves

news.ycombinator.com Unknown 2025-09-04 21:46:40

Like the simulation depicting how a neutron star cracks, this one also predicts the characteristics of the resulting flares astronomers might see through telescopes. In the fleeting moments when monster shock waves rip outward and a black hole pulsar forms, telescopes may be able to catch outbursts of radio waves or a combination of X-rays and gamma rays. In short, the simulations performed by Most and colleagues provide a deeper understanding of the physics driving some of the most energetic ev

Topics: black hole neutron star waves
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