First glimpse of an isolated black hole

Astronomers have, for the first time, seen an isolated black hole, wandering unattached across the Milky Way. Lone black holes probably litter the Galaxy, but they’re extremely hard to spot because they are typically observed as they interact with other objects, such as companion stars. Confirming the black hole’s presence took ten years of observations, focusing on how the object’s extreme gravitational pull warps the light from distant stars behind it.