Greenland Structures Provide Clue for Europan Ice

Ice-penetrating radar observations of “double-ridge” features in the Greenland Ice Sheet match similar features found on Jupiter’s moon, Europa.

IMAGE: This artist’s conception shows how double ridges on the surface of Jupiter’s moon Europa may form over shallow, refreezing water pockets within the ice shell. This mechanism is based on the study of an analogous double ridge feature found on Earth’s Greenland Ice Sheet. CREDIT: Justice Blaine Wainwright

While Io is a volcanic and lava-covered little world, Europa is known as an icy world. It’s another of Jupiter’s Galilean moons, and it’s…