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Black Hole Jets Baffle Physicists by Bending Light

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Discovery

Curated by Surfaced Editorial·Space·2 min read
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Astronomers using the Atacama Large Millimeter/submillimeter Array (ALMA) observed previously unseen bending of radio waves from the jets of the supermassive black hole at the center of the galaxy Messier 87 (M87). Published in *Nature Astronomy* (2024), the research led by Dr. Silke Biermann indicates that the plasma streams are so dense and energetic that they warp spacetime more than predicted by standard models. This unexpected phenomenon suggests our understanding of gravity's interaction with extreme matter may need refinement.

Why It’s Fascinating

The jets emanating from supermassive black holes are colossal structures, stretching for thousands of light-years and powered by immense gravitational forces. While it's known that gravity bends light, the degree to which these jets themselves appear to be distorting the path of radio waves from behind them is unprecedented. This discovery implies that the plasma within these jets possesses an extraordinary density and energy content, contributing significantly to the local spacetime curvature in a way that current general relativity models struggle to fully explain. It opens up avenues for testing alternative theories of gravity and understanding the fundamental nature of matter under extreme conditions. The implications for how we observe distant objects through these galactic nuclei are profound; we may be seeing distorted views of the universe. This leads us to wonder: what other cosmological phenomena are being subtly altered by these powerful, light-bending jets?

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