Monster gravitational waves spotted for first time

Gravitational waves have been detected again, this time using a different technique than before. Instead of ground-based detectors, researchers have been tracking changes in the distances between Earth and pulsars, beacon stars in our Galactic neighborhood. These changes reveal how space is stretched and squeezed by the passage of gravitational waves. The latest discovery involves waves originating from the combined signal of many pairs of supermassive black holes, which are millions or even billions of times the mass of the Sun. These waves are much stronger and longer than those detected in 2015. While not yet considered a firm detection, the evidence for gravitational waves is strong and researchers are now pooling their data to confirm the findings.

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