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

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

A group of swirling storms at Jupiter's north pole are bouncing off each other, like bumper cars at the fairground.

NASA Juno spacecraft data has been used to create an animation of "Steeple Mountain" and a lava lake known as Loki Patera on ...

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

More about Io: Jupiter moon of Io is famed for its volcanoes. NASA just spotted the most powerful one yet NASA's Juno spacecraft launched in August 2011 from Cape Canaveral Air Force Station on ...