Astronomers have found a new minor planet beyond Pluto. This object, named 2017 OF201, is quite large. It orbits far from the ...

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

where thousands of objects sit beyond the orbit of Neptune. Pluto, therefore, is not the gravitationally dominant object in its neighborhood — and thus, not a planet, according to the new ...