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

Scientists found a possible new dwarf planet — it could spell bad news for Planet 9 fans; Thayne Currie, ... Another candidate for the largest planet, HAT-P-67 b, ...

With a width of about 2,377 kilometers, Pluto, the biggest dwarf planet, is significantly larger in comparison. This means 2017 OF201 is quite big but still much smaller than Earth.

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

The planet is about 690 miles wide, making it the seventh largest trans-Neptunian object, while former solar system planets Pluto and Eris are the biggest in the region.

Makemake is the third-largest known dwarf planet in our solar system, after Pluto and Eris, with a diameter of 888 miles across. It takes about 309 years to orbit the sun.

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.

But that is still big enough to be considered a dwarf planet, lead study author Sihao Cheng of New Jersey's Institute for Advanced Study told AFP. "Lucky" discovery.

Ceres is the largest object in the asteroid belt between Mars and Jupiter and the only dwarf planet located in the inner solar system. In 2015, it became the first dwarf planet to be visited by a ...

The largest rocky planets, called "super-Earths," are about twice as wide as Earth. "In comparison, Wasp-17b has a radius which is equivalent to 22 times that of Earth," Ulmer-Moll said.

Eris is the largest known dwarf planet in the solar system. It is a trans-Neptunian object (TNO), orbiting the Sun in a region of space known as the scattered disc, just beyond the Kuiper belt ...