Some scientists think they discovered a new dwarf planet at the edge of the solar system, so far away that it takes around 25 ...

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

For the unversed, "Planet Nine" is a hypothetical planet which is reportedly larger than Earth that is thought to orbit ...

OF201 spends only 1% of its orbital time close enough to us to be detectable. The presence of this single object suggests ...

A new dwarf planet, discovered beyond Neptune and described as Pluto's 'cousin,' could void the hypothesis of a Planet X in ...

As a result of the International Astronomical Union’s 2006 demotion of Pluto from planet to dwarf planet, our solar system ...

U.S. astronomers hunting for "Planet Nine" have instead stumbled on what appears to be a new dwarf planet in the solar system ...

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

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

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

Almost 20 years after Pluto was infamously downgraded from its status as a planet, scientists now believe they have ...

WASHINGTON, May 30 (Reuters) - Scientists have identified an object about 435 miles (700 km) wide inhabiting the frigid outer reaches of our solar system that might qualify as a dwarf planet ...