Because Io is so close to its massive host planet, the moon is subjected to a tremendous gravitational pull as it orbits Jupiter once about every 42 hours, according to the Planetary Society.

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

The volcanic moon, which orbits the gas giant Jupiter, has long been written ... be living in the lava tubes that cover Io, allowing the lava from the planet’s core to seep to the surface.

The Io–Jupiter system is similar ... and raising broader questions about similar magma oceans within other moons and planets. But new measurements from Juno, coupled with archival data from ...

Io is the most volcanic body known to science, and researchers have puzzled over its history for years. A new report suggests it was born this way. This image revealing the north polar region of ...

Jupiter, the largest planet in our solar system, has a total of 92 moons. Io is only slightly larger than Earth's moon and the fourth-largest moon in the solar system. It is Jupiter's third ...

Because Io is so close to its massive host planet, the moon is subjected to a tremendous gravitational pull as it orbits Jupiter once about every 42 hours, according to the Planetary Society.

But Io is different ... bringing the spacecraft across the paths of the giant planet's largest moons. Juno flew close to Jupiter's largest moon, Ganymede, in 2021 and then visited Europa for ...

The spacecraft, Juno, has been circling Jupiter since 2016. Since then, it has orbited the planet to learn more about the gas giant and its moons, NASA said. Io, one of Jupiter's moons ...

Io's distance from Jupiter subjects it to tremendous tidal forces as it orbits the giant planet. As a result, the tidal forces generate heat within the moon, keeping its subsurface crust in liquid ...

Io is the fifth most distant moon from Jupiter ... The cause is tidal friction; Io is tidally locked to Jupiter, always showing the planet the same side, yet its orbital path is elliptical ...