A new dwarf planet, discovered beyond Neptune and described as Pluto's 'cousin,' could void the hypothesis of a Planet X in ...

For the unversed, "Planet Nine" is a hypothetical planet which is reportedly larger than Earth that is thought to orbit ...

"Meanwhile, its perihelion—the closest point on its orbit to the sun—is 44.5 times that of Earth's orbit, similar to Pluto's orbit." This extreme orbit, which takes the object approximately ...