In a first, 2 #supermassive black holes seen #closest to colliding

Two #supermassive #black #holes are on their way to colliding in a #cataclysmic event and are the closest to colliding black holes ever observed.

In a first, 2 #supermassive black holes seen #closest to #colliding

In a first, scientists observe pair of #supermassive black holes closest to #collision course

#Supermassive Black Holes en Route to #Cataclysmic Collision: Doomed Pair Closer Than Ever Observed