Scientists have identified an object about 700km wide inhabiting the frigid outer reaches of our solar system that might ...

A potential new dwarf planet has been discovered in the outer reaches of the solar system, and its existence poses the ...

In a distant region of space thought to be empty, a newly discovered dwarf planet inspires a debate about the existence of a giant planet hiding out there.

The discovery challenges the Planet Nine hypothesis, which suggests a massive, unseen planet is influencing the orbits of distant TNOs. While most extreme TNOs show a clustered pattern that supports ...

The small world was found during a search for the hypothetical Planet Nine, and astronomers say the next time it will reach ...

Astronomers have announced the discovery of a new dwarf planet in our solar system, named 2017 OF201. Located far beyond ...

Scientists have discovered a colossal object approximately 435 miles wide in the frigid outer reaches of our solar system, ...

Pluto, the largest of those dwarf planets, has a diameter of about 1,477 ... "The presence of this single object suggests that there could be another hundred or so other objects with similar ...

Scientists have recently spotted a huge object far away in the cold outer reaches of our solar system. This ...

might have found a new dwarf planet, potentially leading to more evidence of a theoretical super-planet. The scientists announced in a news release that they have found a trans-Neptune Object(TNO ...

Pluto, the largest of those dwarf planets, has a diameter of about 1,477 ... posted on the open-access research site arXiv, opens new tab. The study has not yet been peer reviewed.

A new dwarf planet discovery in the outer solar system is challenging the long-standing theory of a hidden giant planet ...