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

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

Turn a telescope to the eastern sky in the hours following midnight on Nov. 5 to see two colossal shadows darken the cloud tops of the gas giant Jupiter as the Galilean moons Io and Europa pass ...

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

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

CAPE CANAVERAL, Fla. (AP) — The solar system has a new winner in the moon department. Twenty new moons have been found around Saturn, giving the ringed planet a total of 82, scientists said Monday.

How nutrients from Europa's icy shell reach its ocean has been unclear despite several theories.

Add Yahoo as a preferred source to see more of our stories on Google. Titan (left) and Europa (right). (Left: NASA/JPL/University of Arizona/University of Idaho ...

On January 18, 2026, the new moon creates dark skies for observing Jupiter, Saturn, and the Orion constellation. Detailed positions and celestial coordinates for global observers are provided.

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