Cambridge, MA – The existence of black holes is perhaps the most fascinating prediction of Einstein’s Theory of General Relativity. When any mass, such as a star, becomes more compact than a certain ...
An extraordinarily brilliant point of light seen in a distant galaxy, and dubbed ASASSN-15lh, was thought to be the brightest supernova ever seen. But new observations from several observatories, ...
Gravitational-wave detectors have captured their biggest spectacle yet: two gargantuan, rapidly spinning black holes likely forged by earlier smash-ups fused into a 225-solar-mass titan, GW231123. The ...
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