Recent research suggests a warp in the orbital plane of Trans-Neptunian Objects (TNOs) between 80 and 400 AU, hinting at the ...

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

Astronomers propose a new hypothetical planet, Planet Y, beyond Neptune, based on observed orbital anomalies in the Kuiper ...

For years, astronomers have searched the outer reaches of our solar system for Planet 9, a theoretical planet that could ...

A study suggests an Earth-sized planet, dubbed Planet Y, may exist beyond Neptune, affecting the orbits of icy objects in the ...

Far beyond Neptune, astronomers believe a mysterious giant planet is hiding in the darkness. Known as Planet 9, this world ...

New discoveries of objects in the Kuiper Belt have also presented challenges for the Planet Nine theory. The latest is known ...

It all unfolded at around 9:30 a.m. Wednesday morning at the Planet Fitness facility located at 6433 Orchard Lake Rd., police ...

Space The Hunt for ‘Planet Nine’: Why There Could Still Be Something Massive at the Edge of the Solar System The mystery of Planet Nine is far from solved. Here's what we know.

A recent study hints at a previously unknown Earth-sized planet, dubbed Planet Y, potentially influencing gravitational distortions in the outer solar system.

You might be thinking about a giant trilobite found on Pluto, or maybe a dinosaur skeleton on the planet. However, when astronomers use the word "fossil" for ...

If Planet Nine exists, it would therefore perhaps have to be farther than 500AU away from the Sun. To make matters worse for the Planet Nine theory, this is the fourth sednoid to be discovered.