Is there a massive undiscovered planet on the outer reaches of the Solar System? The idea has been around since before the ...

The post Scientists Might Just Have Discovered Another Dwarf Planet Sibling For Pluto first on TwistedSifter. In 2006, Ceres – located in our solar system’s main asteroid belt – was officially ...

A telescope has discovered a new world on the edge of the Milky Way – potentially confirming the ‘Planet X’ theory. Beyond ...

2017 OF201 is about one-third the size of Pluto, which was reclassified as a dwarf planet in August 2006, and "is likely large enough to qualify as a dwarf planet, and its orbit is extremely wide ...

Cheng and his colleagues estimate 2017 OF 201 ’s diameter to be 700 km, which would make it the second largest known object in such a wide orbit. The diameter of Pluto, meanwhile, is 2,377 km.

Scientists may have discovered a dwarf planet far beyond Neptune — an unearthing that may disprove a longstanding theory about the possibility of a giant ninth planet. The dwarf planet's existence ...