This pair of merging black holes is the closest to Earth we've ever found Space.comAstronomers Spot Two Supermassive Black Holes on a Collision Course GizmodoVery Large Telescope uncovers closest pair of supermassive black holes yet Phys.OrgClosest Supermassive Black Hole Pair to Earth Discovered, On Verge of Collision NewsweekJourney to the closest pair of supermassive black holes European Southern Observatory (ESO)View Full Coverage on Google News