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.

Last year, a study led by planetary scientist Richard Cartwright at the Johns Hopkins Applied Physics Laboratory (APL) in Laurel, Maryland, proposed that deposits of carbon dioxide ice and other ...

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 ...