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 ...

A planemo is a planetary-mass object that never undergoes fusion, unlike stars.

Astronomers are challenging an existing theoretical model and thrilling the astronomy community with their discovery of a seven-Jupiter-mass companion next to a planemo, or planetary mass object, only ...

A newly spotted pair of planet-sized objects floating far away from any starhas astronomers puzzling over how such a bizarre system could have formed. Using theEuropean Southern Observatory's ...

Planetlike objects floating alone through space harbor disks of material that could make other planets or moons, something like miniature versions of our solar system, astronomers said Monday. What ...

Planet-like objects floating alone through space harbor disks of material that could make other planets or moons, something like miniature versions of our solar system, astronomers said today. What ...