Black Hole's Wobbling Jets Confirm Einstein's Spacetime Warping Theory

An international team of astronomers has observed a rare event near a supermassive black hole. Initially classified as a tidal disruption event (TDE), the phenomenon revealed unusual behaviour that confirmed a key prediction of Einstein’s general relativity. The event, named AT2020afhd, began when a star was torn apart by the black hole’s gravity. Its remains formed a swirling accretion disk, while powerful jets of high-energy particles shot outward.

Rather than staying fixed, both the disk and the jets began to 'wobble' in a steady 19.6-day cycle. This rhythmic motion matched in X-ray and radio observations, showing the disk and jet were physically linked. The cause was identified as Lense-Thirring precession, or frame-dragging—a distortion of spacetime caused by the black hole’s rotation. The black hole’s spin axis and the orbit of the stellar debris were misaligned, creating the wobble. However, the effect was temporary, fading away after roughly 300 days. By combining X-ray and radio data, researchers tracked the phenomenon in unprecedented detail. The findings provided direct evidence of frame-dragging, a cornerstone of Einstein’s theory of general relativity.

The discovery marks the first clear detection of Lense-Thirring precession in a TDE. It demonstrates how extreme gravity near black holes can warp spacetime itself. The observations also highlight the value of multi-wavelength astronomy in studying such rare cosmic events.