A group of Manitoba researchers were involved behind the scenes of an international effort that this week revealed how two massive black holes careened into one — happily, billions of light years from Earth.

University of Manitoba astrophysicist Samar Safi-Harb, the Canada Research Chair in Extreme Astrophysics, and her team are collaborators on the LIGO-Virgo-KAGRA program, which on Monday published evidence of what Safi-Harb says is "the most massive binary black hole detected to date."

Another…