GW170104: Observation of a 50-Solar-Mass Binary Black Hole Coalescence at Redshift 0.2 User JustAnotherMortalMan, in the For Discussion on Recent Developments in Physics subreddit, 02 Jun 2017
GW170104: Observation of a 50-Solar-Mass Binary Black Hole Coalescence at Redshift 0.2 User ironywill, in the Reddit Science subreddit, 01 Jun 2017
LIGO detects another gravitational wave - GW170104: Observation of a 50-Solar-Mass Binary Black Hole Coalescence at Redshift 0.2 User SweatyBaws, in the Physics subreddit, 01 Jun 2017