To contain so much water, the planets must “accrete,” or gather under its immense gravity ... computer models of Uranus and ...

They’re running rings around Uranus. New research suggests a moon ... has sources of water hidden below its surface. The ...

Carbon dioxide ice is thought to be unlikely at Uranus because at that distance from the sun—20 times farther than Earth—it should turn to gas. However, Ariel’s surface—which has canyons ...