Starless and Bible Black
These things are called planetary mass objects or "planemos". They've been known for some time as partners to stars, but this is the first time that a starless pair is found.
Planemos are objects similar to brown dwarfs, failed stars too small to sustain the nuclear reactions required for stellar ignition. But at only a few times more massive than Jupiter, they resemble planets more than stars.[More blog entries about astronomy, planemos; astronomi.]