Two Planemos, No Sun

Planetary-mass objects, or planemos, are a relatively new addition to the astronomy pantheon. There remains a great deal to be discovered about them, and the mysteries are compounded by the recent discovery of a binary pair of objects too small to be stars in their own right, but which have no parent star either. It’s unclear whether this is a common occurance or a rare fluke, but the answer could tell us a lot about how planemos are formed.