The movements of the planets in the Solar System are pretty difficult to get your head around, even before we get started on ...

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

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 ...

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

A solar wind event squashed the protective bubble around Uranus just before Voyager 2 flew by the planet in 1986, shifting ...

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

One of the primary reasons some astrophysicists propose there is a planet beyond Neptune has to do with odd orbits. “Orbits of the most distant small bodies — comets or asteroids — seem to be ...

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

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

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

Uranus's upper atmosphere has been cooling for decades—and now scientists have shown why. Observations from Earth have shown ...