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

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

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 ...