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

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

As it orbits the sun once every 25,000 years, the celestial body 2017 OF201 travels beyond the Kuiper Belt into a region ...

A team of astronomers believe they may have discovered a new dwarf planet—just like Pluto—on the edge of our solar system.

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

The TNO, which are described as minor planets that orbit the sun at a greater distance than Neptune, were found on the edge ...

Given the name 2017 OF201, the object falls into a category called trans-Neptunian objects that orbit the sun at a distance ...

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

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 The study has not yet been peer reviewed.

It's an evocative idea that has long bedeviled scientists: a huge and mysterious planet is lurking in the darkness at the ...

"It's very rare to discover an object both large and with an exotic orbit." A potential new dwarf planet has been discovered in the outer reaches of the solar system, and its existence poses the ...