Could an ocean – likely needed to sustain life – even survive on a planet orbiting close to a dead star? The sun will someday ...

The exoplanet may be as volcanic as Jupiter's moon Io, which is very active due to the planet's gravitational forces heating up its interior.

The four Galilean moons of the planet Jupiter, photographed by the Galileo spacecraft, circa 1996. From left to right, they are Europa, Io, Callisto and Ganymede.

Described as being like "Io on steroids," a newly discovered exoplanet is the victim of a tug of war between its neighboring planets and its star.

The fifth planet from the sun, Jupiter is what watercolor dreams are made of. Vibrant bands of clouds ripple around its thick ...

But it’s not just looks. Rocky composition, general size, orbital behaviors—a lot of those qualities can be the same on both ...

Jupiter’s moons, such as Io and Europa, could produce striking solar eclipses on the planet. These phenomena illustrate the dynamic interactions between moons and planetary light.

Jupiter hosts the brightest and most spectacular auroras in the solar system. Near its poles, these shimmering lights offer a ...

That mystery was resolved thanks to Nasa's Juno spacecraft, which has been orbiting Jupiter since 2016. During its 22nd orbit in September 2019, Juno captured evidence of Callisto's long-sought ...

Volcanic eruptions on Jupiter's moon Io send electrically charged lava plasma toward the planet's poles. The Hubble Space Telescope helped researchers track electric currents driving the aurora.