active·Information societyMerger of two black holes challenges astrophysics with GW231123 signal11 Sept 2026·1 event·1 sourceFollowHow events unfoldedFrom the beginning to today11/09/2026, 09:28Merger of two black holes challenges astrophysics with GW231123 signal1 source →1 of 1 eventsStoryline coverage1 source · 1/7