Almost 10 years ago, a NASA spacecraft was able to take several photos of Pluto, known for decades as a planet before it was ...

The relative quantities of volatile gases like methane and ethane can reveal key details about distant Kuiper Belt objects.

Hygiea, classified as an asteroid so far, might actually be a dwarf planet. The European Southern Observatory has been able to confirm that Hygiea has a spherical shape. But, Hygiea is missing a ...