Add Yahoo as a preferred source to see more of our stories on Google. The hellish surface of a moon of Jupiter known as Io is riddled with hundreds of lava-spewing volcanoes that make the world one of ...

Io, one of the four Galilean moons of Jupiter, as seen by the Galileo probe, circa 1997. (Photo by Space Frontiers/Hulton Archive/Getty Images) New data from NASA’s $1.2 billion Juno spacecraft — now ...

In a surprise discovery, NASA's Juno team has measured the temperature beneath the surface of Jupiter's moon Io for the first ...

Learn how Jupiter's gravitational pull impacts its moon Io, producing strong underground heat that powers hundreds of volcanoes.

Jupiter’s innermost Galilean moon, Io, crosses the gas giant along with its shadow this evening in an event visible across the U.S. Jupiter rises around 6:30 P.M. local time, climbing above the ...

Turn a telescope to the eastern sky in the hours following midnight on Nov. 5 to see two colossal shadows darken the cloud tops of the gas giant Jupiter as the Galilean moons Io and Europa pass ...

Infrared mapping tech aboard the spacecraft sheds light on the volcanic activity of Io, Jupiter's second-smallest Galilean moon Reading time 2 minutes It’s not a big moon relative to a few of its ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. An image of Jupiter and Io as seen by NASA's Juno on August ...

A new international study co-led by Aix-Marseille University and Southwest Research Institute (SwRI) reveals that the striking contrast in the water contents of Jupiter’s Galilean moons was ...

From the cratered companion that lights Earth's night sky to the hundreds of icy worlds circling the Solar System's giant planets, moons are among the most fascinating objects in space. Over the past ...