Some, like Europa or Enceladus, have spectacular and perhaps even habitable liquid water oceans. And then there’s Jupiter’s moon, Io. Io is the most volcanic object known to science.

Jupiter's moon Io is the solar system's most volcanic body thanks to a gravitational tug of war that rages below its surface. But now scientists know the violent moon has always been this way.

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.

Jupiter’s moon Io may have been volcanically active throughout its life. In this image of Io, taken by NASA’s Juno spacecraft in 2023, a bright volcanic plume can be seen on the left, just ...

Flybys of Jupiter’s fiery moon Io, carried out by NASA’s Juno spacecraft, are helping to solve the enduring mystery of why the small moon is the most volcanically active body in our solar ...

The tides that Jupiter raises on Io, however are powerful enough to induce sufficient friction in that moon's rocks, melting and volcanoes can result. A similar phenomenon produces ice volcanoes ...

Close flybys of Io, one of Jupiter’s moons and the most volcanically active world in our solar system, have revealed a lava lake and a towering feature called “Steeple Mountain” on the moon ...

New research has found Jupiter's moon Io is the most volcanically active place in the solar system and has been for billions of years. The work by the California Institute of Technology (Caltech ...

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. This at ...