A supermassive black hole has been found lurking about 30,000 light-years from the center of its galaxy—the first dormant black hole detected so far from a galactic core. It revealed itself only after shredding a passing star and producing a brief, brilliant flare. Astronomers think it may be the remnant of a devoured galaxy or a black hole flung outward during a chaotic cosmic encounter.

Giant black holes adrift in deep space are normally invisible—unless they’re dining on stars

NASA Just Spotted a Wandering Black Hole Devouring a Star: Black holes sometimes make a break for it