Astronomers have found a rocky planet where it should not exist, orbiting far from a cool red star. Could this strange ...

A planetary system 116 light-years from Earth has a peculiar pattern. It could flip the script on how planets form, ...

For decades, scientists have believed that planetary systems typically form with rocky planets close to their star and ...

Astronomers have found a distant world that challenges planetary formation theory, with a rocky planet where gas giants should be.

Surprised astronomers said Thursday they have discovered a star with planets in a bizarre order that defies scientific expectations -- and suggests these faraway worlds formed in a manner never seen ...