An international team including astronomers from the Center for Astrophysics | Harvard & Smithsonian (CfA) has announced the ...

The presence of another planet in the solar system could explain the odd movements of some of the bodies in the Kuiper Belt.

University of Central Florida (UCF) scientists and their collaborators discovered new insights into the formation of distant ...

Researchers say they found a curious dot on infrared images taken 23 years apart that seems to be moving in a manner consistent with a large, distant planet.