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

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

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 ...

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

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

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

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.

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.

Alongside the planets will be a nearly-full 'sturgeon moon' that will reach peak illumination on August 9. The planet parade ...