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 finally pinned down both the mass and distance of a solitary “rogue” planet, a world that drifts through space without the warmth or light of a parent star. The object, a Saturn-sized ...

While most planets that we are familiar with stick relatively close to their host star in a predictable orbit, some planets seem to have been knocked out of their orbits, floating through space free ...