Sedna is drifting into a part of its path where human technology can finally contemplate catching up, and that window will ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. An illustration of confirmed dwarf planets and their moons. From left to right: Pluto (with ...

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. "Kuiper Belt ...

The relative quantities of volatile gases like methane and ethane can reveal key details about distant Kuiper Belt objects. When you purchase through links on our site, we may earn an affiliate ...