While searching for the mysterious Planet X that some astronomers believe lurks on the edge of our solar system, researchers instead found an extremely distant object they dubbed “the Goblin.” And ...

Astronomers have discovered an extremely cool object that could have a particularly diverse history; although it is now as cool as a planet, it may have spent much of its youth as hot as a star. The ...

A new discovery is strengthening the idea that a large, mysterious planet — known as Planet 9 or Planet X — may be lurking unseen at the Solar System’s edge. Astronomers say they have found a tiny ...

A newfound object nicknamed "The Goblin" lurking in the far reaches of our solar system could be yet another clue that points us toward the discovery of the theoretical Planet X, or Planet 9 -- a ...

The James Webb Space Telescope detected an atmosphere rich with carbon and helium, which is unexpected on this hot planet ...

Astronomers photographed a baby planet, WISPIT 2b, during its formation process within a dusty ring around its star system.

The HubbleSpace Telescope has spied one of the smallest objects ever detected around anormal star. The object further blurs the line between stars and planets and raises new questions abouthow planets ...

Just because Pluto was ruled out as a planet in 2006 doesn’t mean our solar system only has eight planets. The search for Planet Nine is far from over as scientists continue to uncover clues ...

Scientists have made the first direct observation of a planet-like object orbiting a star similar to the sun. An international team of scientists that includes an astronomer from Princeton University ...

Astronomers have discovered an extremely cool object that could have a particularly diverse history - although it is now as cool as a planet, it may have spent much of its youth as hot as a star. The ...

It's far out, man – literally. Researchers have uncovered the most-distant celestial object in the solar system, a pink dwarf planet nicknamed "Farout," detect at a distance of more than 100 times ...