Hiding in a clump of stars 10,000 light-years away are two small black holes, slowly sipping their stellar prey.
Evidence for two small black holes (bright spots in right panel) comes from radio observations of the globular cluster M22 (left). The pair defies predictions of black hole behavior. D. Matthews and A. Block/NOAO/AURA and NSF
But the black holes shouldn’t be there — at least, not both of them.
Log in
Subscribers, enter your e-mail address for full access to the Science News archives and digital editions.