A bit larger than our Moon, Io is the innermost of Jupiter’s four large moons. As it circles Jupiter, Io is gravitationally perturbed by its three sister moons, first being pushed slightly closer to ...

Other moons of Jupiter, like Europa and Ganymede ... over 20 years ago. In size, Io is roughly comparable to the Earth’s moon, also known as “The Moon”. Io is wracked by volcanic activity ...

Like Earth's moon, Io is tidally locked to Jupiter, with one side more readily available for study than the Jupiter-facing side. But Jupiter's effect on Io is much stronger than Earth's effect on ...

Io, Jupiter's moon and the most volcanic body in the solar system, has been in upheaval for at least 4.57 billion years. Scientists used the Atacama Large Millimetre/submillimetre Array (ALMA ...

Advising readers to scan the night sky this time of year always feels a little awkward, because the Pacific Northwest’s ...

Transits, occultations, eclipses, and shadow transits of the jovian moons are perfect events for telescopic viewing.

Learn how you can see bright Jupiter from Earth, helped by its massive size and banded, reflective cloud tops, in December's ...

Unusual vortices tied to Jupiter’s magnetic field may be driving massive formations of atmospheric haze close to the giant ...

While Jupiter’s Great Red Spot has been a constant feature of the planet for centuries, a team of astronomers have discovered ...

Magnetic vortices twisting down from Jupiter's ionosphere into its deep atmosphere cause giant, ultraviolet-absorbing polar ...

New research reveals that Jupiter’s magnetic tornadoes generate massive Earth-sized storms, visible only in ultraviolet light ...