Using Radio to Detect the Gravitational Waves of Merging Black Holes

The detection of gravitational waves topped nearly every chart highlighting the most important science stories of 2016. LIGO, the Laser Interferometer Gravitational-Wave Observatory, made headlines by detecting direct evidence of ripples in spacetime caused by two merging black holes. Historic and exciting, this discovery will probably be the first of many gravitational wave signals we see over the coming years--and not all of them will come from gravitational wave observatories. Supermassive bl...