NASA scientists have sought to understand planet Jupiter, the gas giant whose mass is more than the rest of the planets in ...

One of the big surprises: Despite the moon's cooled crust, the data shows Io maintains liquid hot lava just below the ground.

The Voyager 1 spacecraft had flown past this moon of Jupiter, catching the first glimpse of active volcanism on a world other than Earth. Umbrella-shaped outbursts of magmatic matter rocketed into ...

More about Io: Jupiter moon of Io is famed for its volcanoes ... but was observed belching out eruptions six times the total energy of all the world’s power plants combined.