Astronomers have long speculated about the existence of a mysterious planet lurking far beyond Neptune, a world several times ...

There are currently no other explanations for the effects that we see, nor for the myriad other P9-induced effects we see on ...

Exciting new findings reveal that WASP-121b, a blazing-hot giant planet, may have formed far from its star in a colder, ice-rich region—before migrating inward to its current extreme orbit. Chemical f ...

A huge object, possibly as big as Manhattan, has entered our Solar System and it might be more than just a rock. Some scientists now say it could ...

An icy object in perfect sync with Neptune reveals new details about planetary migration and unseen bodies far beyond the Kuiper Belt.

Astronomers have found 2023 KQ14, nicknamed Ammonite, a rare sednoid with a unique orbit that challenges the Planet Nine ...

"We believe that continuing such activities will further expand our horizon in the field of planetary science." ...

Stars are the fundamental building blocks of our universe. Most stars host planets, like our Sun hosts our solar system, and if you look more broadly ...

Astronomers have discovered "Ammonite," a mysterious object on the solar system’s edge whose unusual orbit challenges current ...

This object is the first confirmed body that orbits the sun once for every ten orbits Neptune completes.

A team of astronomers discovered a strange object in the outer solar system that is in a resonant orbit with Neptune.

Theories about Planet Nine have been swirling for years, but this newly discovery planet might put those theories to bed for good.