University of Oklahoma

Distant world orbits beyond Pluto

Astronomers have spotted a distant world that orbits far beyond Pluto, in the extreme reaches of the Solar System.
The object, known informally as L91, may be in the process of gradually shifting its way inward from the Oort cloud — a reservoir of comets and other icy bodies — into the equally icy Kuiper belt. No object has ever been seen doing this.