Gravitational waves from a binary black hole merger observed by LIGO and VirgoVirgo Observatory. Credit: The Virgo Collaboration/CCO 1.0 The LIGO Scientific Collaboration and the Virgo collaboration report the first joint detection of gravitational waves with both the LIGO and Virgo detectors. This is the fourth announced detection of a binary black hole system and the first significant gravitational-wave signal recorded by the Virgo detector, and highlights the scientific
