While Io, the most volcanically active moon in the solar system, appears completely dry and devoid of water ice, its neighbor ...

There’s no mistaking Jupiter in the sky these winter evenings, rising in the southeast as evening twilight ends. In fact, you should be able to easily see it long before twilight fades. Jupiter is ...

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 chaos and violence. The brutal conditions also make Io intriguing to ...

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 ...

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 ...

What processes are responsible for the intense volcanic activity on Jupiter’s innermost Galilean moon, Io, and what can this tell us about volcanic worlds that could exist throughout the cosmos? This ...

In a landmark observation by a team of international researchers, NASA's Juno spacecraft has, for the first time, clearly detected the auroras of Jupiter's moon Callisto. This discovery completes the ...

Jupiter's moon count reaches 95+ official satellites. Explore the history of the Jovian system, from Galileo to the latest NASA discoveries.

A celestial conjunction event featuring Venus and Spica is anticipated for November 3. Jupiter is expected to display a multi-phase transit phenomenon involving Io and its shadow, along with Europa's ...

While Io, the most volcanically active moon in the solar system, appears completely dry and devoid of water ice, its neighbor ...