A fourth gravitational wave detector, this one in Gifu Prefecture, Japan, will join the global search for cosmic events that cause ripples in spacetime, beginning this December.
A pair of objects, each more massive than the Sun but only as wide as a city, have once again produced ripples in spacetime that were picked up by sensitive gravitational wave detectors on Earth. But this time, scientists think they may have measured something even weirder the usual.
Physicists have spotted four new instances of black holes colliding and sending their gravitational waves toward the Earth, including the most massive collision recorded to date.