The surface of Uranus' moon Ariel is coated with a significant amount of carbon dioxide ice, especially on its "trailing hemisphere" that always faces away from the moon's direction of orbital motion.

Some of the most carbon dioxide-rich deposits in the solar system reveal Ariel could be another solar system moon with buried liquid water. When you purchase through links on our site, we may earn an ...

Our Solar System, like a sneaky little hobbit, seems to have stuffed its pockets full of hidden oceans. Jupiter, Saturn, Uranus, and Neptune all have moons astronomers think might be harboring liquid ...