The cast of exoplanets has an extraordinary new member. Using ESO’s telescopes, astronomers have discovered an approximately seven- Jupiter-mass companion to an object that is itself only twice as ...

Alain Doressoundiram (Observatoire de Paris) and Christian Veillet (CFH Institute) have just discovered that the transneptunian object 1998 WW31 is in fact a double object. It is during their ...