In searching for the elusive Planet Nine, researchers instead turned up a different resident in our cosmic backyard.

For the dwarf planet candidate, one trip around the sun takes over 24,000 years. Its orbit challenges a proposed path for a hypothetical Planet Nine.

A possible new dwarf planet has been discovered at the edge of our solar system, so far-flung that it takes around 25,000 years to complete one orbit around the sun. The object, known as 2017 ...

Scientists may have discovered a dwarf planet far beyond Neptune — an unearthing that may disprove a longstanding theory ...

WASHINGTON >> Scientists have identified an object about 435 miles wide inhabiting the frigid outer reaches of our solar system that might qualify as a dwarf planet, spotting it as it travels on a ...

OF201, the object belongs to the same all-star family as Pluto: dwarf planets. Its diameter, roughly 435 miles (700 km), is ...

It’s icy, very far from the sun, and might be big enough to count as a dwarf planet. Called 2017 OF201, this object travels in a huge, stretched-out path and takes 25,000 years to orbit the sun ...

Cheng said the discovery of 2017 OF201 has implications for hypotheses involving the potential existence of a ninth planet in our solar system, dubbed Planet X or Planet Nine. This is because 2017 ...

A possible new dwarf planet has been discovered at the edge of our solar system, so far-flung that it takes around 25,000 years to complete one orbit around the sun. The object, known as 2017 ...

The researchers said 2017 OF201 was identified in observations by telescopes in Chile and Hawaii spanning seven years. “It is potentially large enough to qualify as a dwarf planet.

The potential planet, which has been temporarily called 2017 OF201, takes "more than 24,000 years to travel around the sun just once along a highly elliptical orbit, coming as close as 4.2 billion ...