The moon greets Jupiter two days ahead of its full moon phase on Feb. 1.

Using data gathered by NASA's Juno Jupiter orbiter, scientists estimate that Europa's ice shell is about 18 miles thick — ...

"What makes the event even more extraordinary is that it did not involve a single volcano, but multiple active sources." ...

Research into Jupiter’s moons shows Io and Europa did not evolve apart but formed with opposite compositions from the beginning.

There’s no mistaking Jupiter in the sky these winter evenings, rising in the southeast as evening twilight ends. In fact, you should be able to easily see it long before twilight fades. Jupiter is ...

While Io, the most volcanically active moon in the solar system, appears completely dry and devoid of water ice, its neighbor ...

The volcanic hot spot is larger than Lake Superior, spewing eruptions six times the total energy of all of the world's power plants.

"Most excitingly, this new idea addresses one of the longstanding habitability problems on Europa and is a good sign for the ...

Jupiter will be bright through September as it reaches opposition on September 26, when it will be exactly opposite the Sun in our sky. Jupiter and Saturn will be easy to spot Friday night as the Moon ...