A multinational group of astronomers has imaged the formation and expansion of a fast-moving jet of material ejected when the intense gravity of a supermassive black hole at the center of a member of the merging galaxy pair Arp 299 ripped apart a star more than twice the Sun’s mass that came too close to the black hole. An artist’s conception of a tidal disruption event in the merging galaxy pair Arp 299; background is the Hubble image of Arp...