The event, which occurred when the universe was 740 million years young, gives scientists a clue about the number of light black holes in the universe.
Three ancient stars that hail from cannibalized dwarf galaxies are "on the run" at hundreds of thousands of miles per hour in the Milky Way s galactic halo.
Webb detects most distant black hole merger to date phys.org - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from phys.org Daily Mail and Mail on Sunday newspapers.