Gravitational Waves
New analysis of gravitational wave data indicates that the universe's heaviest black holes arise from multiple collisions inside dense star clusters instead of single stellar collapses.
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Researchers propose that ancient gravitational waves in the early universe produced particles that became dark matter. The study by scientists from Johannes Gutenberg University Mainz and Swansea University suggests a new mechanism involving stochastic gravitational waves converting into fermions. Published in Physical Review Letters, the work addresses a key mystery in cosmology.
Astronomers detected the strongest black hole collision yet on September 11, 2025, resonating with Einstein's predictions. The event involved massive black holes merging, producing significant gravitational waves. This finding was published in a leading science journal, advancing astrophysics.