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 ...

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 ...

A way of estimating more accurate distances to the thousands of so-called planetary nebulae dispersed across our galaxy has been announced. The announcement was made by a team of three astronomers ...