Scientists may have discovered a dwarf planet far beyond Neptune — an unearthing that may disprove a longstanding theory about the possibility of a giant ninth planet. The dwarf planet's ...

A possible cousin of Pluto seems to be circling the far reaches of the solar system. The dwarf planet candidate 2017 OF201 travels in a superwide orbit, with the sun relatively near one end of its ...

In December 2003, the Hubble Telescope spotted something peculiar on the surface of Ceres, a dwarf planet in the asteroid belt between Mars and Jupiter. Hazy images revealed something bright and ...

As a result of the International Astronomical Union’s 2006 demotion of Pluto from planet to dwarf planet, our solar system now consists of eight planets, nine dwarf planets, 891 confirmed moons or ...

Possible New Dwarf Planet Spotted Near the Edge of the Solar System By Will Dunham WASHINGTON (Reuters) -Scientists have identified an object about 435 miles (700 km) wide inhabiting the frigid ...

By Kenneth Chang Kenneth Chang has been reporting on dwarf planets and their definitions since Pluto was demoted into that category. A sizable world has been found in a part of the solar system ...

A team of scientists at the Institute for Advanced Study School of Natural Sciences in Princeton, New Jersey, might have found a new dwarf planet, potentially leading to more evidence of a ...

Pluto, the largest of those dwarf planets, has a diameter of about 1,477 miles. Don't miss out on what's happening! Stay in touch with breaking news, as it happens, conveniently in your email inbox.

cientists have identified an object about 700-kilometer wide inhabiting the frigid outer reaches of our solar system that might qualify as a dwarf planet, spotting it as it travels on a highly ...

A new discovery may mean Planet Nine is cancelled. . | Credit: nagualdesign; Tom Ruen, background taken from File:ESO - Milky Way.jpg/Wikimedia Commons A potential new dwarf planet has been ...

Now, a US-based trio hunting this elusive world has instead stumbled on what appears to be a new dwarf planet in the solar system's outer reaches. And the existence of this new kid on the block ...