For reference, Pluto’s average distance from the Sun is about 40 AU, so 2023 KQ14 is quite distant. At 23.4 billion miles (37 ...

A newly discovered dwarf planet called 'Ammonite' (2023 KQ14) has been spotted in the outer solar system, and it could be ...

A sizable world has been found in a part of the solar system that astronomers once thought to be empty. It probably qualifies as a dwarf planet, the same classification as Pluto. Temporarily named ...

"Like Sedna, Gonggong also lacks surface methane," said Bettati. "Since Gonggong is similar in size to Sedna, we believe methane must have escaped from it in a similar fashion.

In the outer reaches of our solar system, far beyond the orbit of Pluto, lies Sedna, one of the most mysterious objects ever discovered. This reddish dwarf planet follows such an extreme orbit ...

Here’s what you’ll learn when you read this story: In 2076, the dwarf planet Sedna will make its closest approach to the Sun in 11,400 years, and scientists are now figuring out the best way ...

When it was discovered, Sedna was around 8 billion miles (13 billion kilometers) from the Sun. (Pluto, the most famous dwarf planet, has an average distance of 3.7 billion miles from the Sun ...

But are these really "planets," or was Pluto merely the first discovery of an entirely new class of objects? In 2006, the International Astronomical Union, the gatekeepers of astronomical nomenclature ...

A surprising chemical difference between Pluto and Sedna, another dwarf planet in the distant Kuiper Belt, is helping scientists nail down their respective masses, a new study reports. The Kuiper ...

Here’s how it works. Artist's illustration of the dwarf planet Sedna, which lies in the distant Kuiper Belt. (Image credit: NASA/JPL-Caltech) ...