https://www.youtube.com/watch?v=1DmCkeK_YU4
https://phys.org/news/2017-11-gravitational-merging-supermassive-black-holes.html New research published November 13 in Nature Astronomy predicts that gravitational waves generated by the merger of two supermassive black holes will be detected within 10 years. The study is the first to use real data, rather than computer simulations, to predict when such an observation will be made. via Gravitational waves from merging supermassive black holes will be spotted within 10 years, study predicts.