Yes. If memory serves this is the first event that LIGO detected. Two black holes of 20-30 solar masses each, joining and releasing 1-2 solar masses worth of gr

Yes. If memory serves this is the first event that LIGO detected. Two black holes of 20-30 solar masses each, joining and releasing 1-2 solar masses worth of gravity. Which resulted in the earth (and space) being stretched by less than a fraction of a proton. And we measured it...