Astronomers find evidence of a possible ninth planet beyond Neptune, reigniting the debate about the formation of the Solar ...

An object on the outer edges of the solar system may have a large moon orbiting it at an unusually close distance. The find could help explain how such binary objects evolved. José-Luis Ortiz at ...

There may be more than meets the eye with The Kuiper Belt, a ring comprising thousands of large, icy objects and dwarf planets that encircle our solar system. A yet-to-be-published study ...