Astronomers have finally pinned down the mass and distance of a lonely world that drifts through the galaxy without a parent star, a feat that turns a once-theoretical class of objects into a ...

Astronomers have, for the first time, pinned down both the mass and distance of a planet that drifts through the galaxy without a parent star, turning a once purely theoretical class of worlds into a ...

A screenshot of James’s animation “Planets and dwarf planets to scale in size, rotation speed & axial tilt in distance order from Sun”. Credit must be given to the creator. Only noncommercial uses of ...