This event marks the first real-time observation of a black hole transitioning from a quiescent to an active state.

Among the events it can identify are tidal disruption events, where a star gets spaghettified by the enormous gravity of a supermassive black hole. Normally, supermassive black holes live at the ...

Its supermassive black hole is estimated to be about 1 million ... observations with the VLT's Multi Unit Spectroscopic Explorer (MUSE) and Extremely Large Telescope, among others, and perhaps ...