Jupiter’s volcanically active moon Io casts its shadow on the planet in this dramatic image from NASA’s Juno spacecraft. As with solar eclipses on the Earth, within the dark circle […] ...

A remarkable series of events involving two of Jupiter's most well-known moons will occur on Monday, Jan. 24, but you'll need a telescope to see them.

Jupiter’s third-largest moon Io is the most volcanically active world in our solar system. New radio images by the ALMA telescope array show the direct effect of this volcanic activity on the ...

Io is plunged into darkness by Jupiter for two hours during every one of its days, which last an equivalent of 1.7 Earth days. Io's volcanoes emit umbrella-like plumes of gas extending up to 300 ...

Io leaves Jupiter's shadow after 1.7 Earth days, which is 2 hours of Io's day, and the sulfur dioxide sublimates — goes straight from solid to gas — and pumps up the atmosphere once again ...

Io is so big & close that it more than blocks the Sun (it appears 4x as big as the Sun from Jupiter’s perspective) and it’s so close that the penumbra (fuzzy outer edge of shadow) is super thin.

Three of Jupiter's largest moons will cast their shadows simultaneously on the planet below them creating three solar eclipses at the same time: a rare cosmic event. News Today's news ...

The moons of Jupiter will perform two shadow dances over the next week for skywatchers equipped with a good amateur telescope. Here's how to see them. Skip to main content.

The thin atmosphere on Jupiter’s volcanic moon, Io, “collapses” when the moon enters the gas giant’s shadow, according to a new study. Writing in the Journal of Geophysical Research ...

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

Jupiter’s volcanically active moon Io casts its shadow on the planet in this dramatic image from NASA’s Juno spacecraft. As with solar eclipses on the Earth, within the dark circle racing ...