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

Planet Fitness will join a revitalized shopping center that recently added Aldi and Tesla. Leaving its former space makes ...

Astronomers believe there is a Planet Nine in the outer solar system beyond Neptune.

Astronomers are closing in on evidence that a massive, unseen planet may exist far beyond Neptune. This discovery could redefine our understanding of the solar system.

Astronomers have long speculated about the existence of a mysterious planet lurking far beyond Neptune, a world several times ...

A newly discovered dwarf planet called 'Ammonite' (2023 KQ14) has been spotted in the outer solar system, and it could be another nail in the coffin for the Planet Nine hypothesis.

"I still have a few years of my career left and knees, I only have two, one of which is already badly damaged." ...

Astronomers used a telescope in Hawaii to find a new object on the outer edges of our solar system, helping to fuel evidence of a long-standing theory about Planet Nine, or Planet X. For years ...

A strange fossil at the edge of the solar system just shook up Planet Nine theories Date: July 20, 2025 Source: National Institutes of Natural Sciences Summary: A tiny object far beyond Pluto ...