In 2018, a galaxy about 270 million light-years away from Earth exhibited a major increase in activity. It quieted down again by 2020 -- only to dramatically increase its output again in 2023. At that ...
A black hole infamous for strange features has once again baffled astronomers, this time with rapid X-ray flashes. What could ...
Active galaxy 1ES 1927+654, circled, has exhibited extraordinary changes since 2018, when a major outburst occurred in visible, ultraviolet, and X-ray light. The galaxy harbors a central black hole ...
Black holes themselves emit no light, but the supermassive black holes at the centers of galaxies are often surrounded by ...
A strange black hole is making scientists scratch their heads. The distant object, dubbed "1ES 1927+654" and packing the mass ...
International teams of astronomers monitoring a supermassive black hole in the heart of a distant galaxy have detected ...