Astronomers used a telescope in Hawaii to find a new object on the outer edges of our solar system, helping to fuel evidence of a long-standing theory about Planet Nine, or Planet X. For years, ...

Scientists believe they have discovered evidence of a hidden planet existing beyond Neptune, which they have named 'Planet Y'. Recently, a study analyzing the orbits of Kuiper Belt objects indicated ...

It’s been nearly 2 centuries since a planet was discovered in the solar system. But now scientists think they’ve uncovered ...

The most elusive planetary aurora in the Solar System has finally been revealed in all its gently glowing glory. Far from the Sun, and Earth, the sky-blue planet Neptune has been captured shimmering ...

Is there a massive undiscovered planet on the outer reaches of the Solar System? The idea has been around since before the discovery of Pluto in the 1930s. Labelled as planet X, prominent astronomers ...

A long quest has ended: there is no tenth planet. But there may be a hundred or a thousand mini-planets in the dark beyond Pluto. For more than a century, a few dedicated astronomers have braved the ...

Astronomers have picked up evidence of an Earth-sized world, distinct from the previously hypothesised Planet Nine and Planet ...

Is there a massive undiscovered planet on the outer reaches of the Solar System? The idea has been around since before the discovery of Pluto in the 1930s. Labelled as planet X, prominent astronomers ...

The cold and mysterious Oort cloud at the edge of our solar system may be hiding a rogue exoplanet, new research suggests. When you purchase through links on our site, we may earn an affiliate ...