Look: First dormant black hole outside the Milky Way peacefully orbits a bright star

Two peas in a pod.

ESO/L. Calçada

ESA/Hubble, Digitized Sky Survey, Nick Risinger (, N. Bartmann

But even among the ruthless, there are exceptions.

Dormant black holes, or ones that don’t appear to have much of an effect on their surroundings, also exist — though they’re extremely hard for astronomers to locate.