Recent flybys of the fiery world refute a leading theory of its inner structure—and reveal how little is understood about ...

Something incredible just happened in our own cosmic backyard. For the first time from Earth, scientists have watched as a volcanic eruption on a distant moon actually changed its surface. Using a ...

The ice on the surface of Jupiter's massive moon Europa is constantly changing, hinting at the presence of a subsurface ocean ...

An image taken on March 8 documented two gigantic plumes arching above its surface ... well as several of the other satellites in our solar system with hidden tidal engines. For now, this volcanic orb ...

While Io’s surface includes at least 400 volcanoes with varying levels of ... resulting in a seemingly endless series of lava plumes and ash venting into its atmosphere from the estimated ...

and volcanic-plume deposits rich in sulfur and sulfur dioxide. Juno will use an upcoming, more distant flyby of Io on March 3 to look at the hot spot again and search for changes in the landscape.

Io, the innermost of Jupiter’s four large moons, is the most volcanically active body in our solar system. Its surface is dotted with hundreds of volcanoes, some of which erupt with towering plumes of ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. The Juno mission ...