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 ...

Solar system formation models using measurements of organics from comet 67P/Churyumov-Gerasimenko and the most widely adopted solar composition ratios did not produce the dense, rocky Pluto-Charon ...

A Southwest Research Institute-led team combined compositional data of primitive bodies like Kuiper Belt objects, asteroids ...

The researchers revealed that Uranus’s protective magnetic field was distorted, and seemed wonky and weak, being squashed and ...

This huge astrological shift is a total game-changer. Here’s how Pluto in Aquarius will affect you—for the next two decades.

Pluto. Due to its large mass, it would have a great internal energy that could sustain, for example, subsurface oceans. Its orbit would be very distant, much beyond Neptune, and much more inclined ...

"Thirty days hath September" is so last year. Check out these other clever, helpful mnemonic devices to help you remember all ...

The Nancy Grace Roman Space Telescope is a NASA observatory designed to settle key questions on exoplanets (a planet outside ...

Tiny grains from a distant asteroid are revealing clues to the magnetic forces that shaped the far reaches of the solar ...

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 ...

Charon| NASA's New Horizons captured this high-resolution enhanced color view of Charon just before the spacecraft made its closest approach to Pluto on July 14, 2015. The changing faces of Pluto ...