Beyond Neptune lies the Kuiper Belt, a vast region of icy bodies that holds the secrets to the solar system’s formation.

It must have cleared all other celestial bodies, except its own moons, from its orbit.

In a clean room at NASA's Jet Propulsion Laboratory in Southern California, scientists have successfully integrated a crucial ...

After a decade-long search, some scientists say a growing number of clues point to the existence of a hidden planet in the Kuiper Belt beyond Neptune — and they may soon have the opportunity to find ...

Are there hidden planets in our solar system? New technologies, like the powerful Rubin Observatory, brings us closer to ...

Scientists have been on the hunt for a possible ninth planet in our solar system for some time ... noted that Planet Nine’s ...

Astronomers are investigating the possibility of a hidden ninth planet beyond Neptune, which could explain unusual orbital patterns in the Kuiper Belt.

We're showing that, everywhere we look now, there was some sort of magnetic field that was responsible for bringing mass to ...

In the time Pluto was found, classified as a planet and reclassified as a dwarf planet, it has not completed one orbit. One ...

A new study suggests that the planet’s icy interior and liquid ocean could be insulated with a three-to-six-mile-thick layer ...