Planet Nine was previously suggested as a possible explanation for distant orbital clustering. It was thought to be ten times Earth’s mass, orbiting far beyond Neptune.

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

An author who’s jumped genres, three picture books from one writer, farming, shipwrecks and poetry are in the spotlight as we ...

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

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

A little birdie says baseball commissioner Rob Manfred wasn’t happy with the Pohlad family’s announcement that it had decided to retain ownership of the Twins, Walters writes.

A tour bus returning to New York City from Niagara Falls with 54 people aboard crashed and rolled on its side Friday on an ...

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

White, the Project Petals founder, said her organization is working to change that by providing the communities with ...

The latest stories from our Planet or Plastic? series—a multiyear effort to raise awareness about the global plastic waste crisis.

The Solar System does not have a clear border. The influence of the Sun in certain domains is small enough for the Voyager ...

A mysterious new world may be hiding in the outer reaches of our solar system. According to arecent study published on arXiv ...