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

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

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

A new study suggests the existence of Planet Y. This hidden planet may be affecting the Kuiper Belt. The gravity of Planet Y ...

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

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.

Elon Musk hopes to expand SpaceX Starship operations in Florida as he continues to work toward launching to Mars in 2026.

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 ...

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

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.

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

A man was arrested Wednesday morning after he allegedly attacked the staff of a Planet Fitness in West Bloomfield Township.