A newly identifiedplanetary system is forcing astronomers to rethink how worlds form and evolve, as a rocky planet appears where no such object should exist, according to a study published in Science.

COVINGTON, Ky. — Remember when ET phoned home? Well, one alien has decided to call Covington home. “Clive” has been watching over residents and visitors in the Central Business District. And with ...

Astronomers suspect that a massive metallic cloud swirling in a nearby star system could be hiding a giant planet or dwarf star from view, after it drastically dimmed a sun-like star for around nine ...