Callisto would be a contender. Jupiter's second-largest moon has more impact craters on its surface than any other planetary body in the solar system, and it has tons of ice on its surface as well.

The vernal equinox occurs as Mercury stands still in Pisces and several of Jupiter’s moons transit in the sky this week.

Callisto, Jupiter's second-largest moon, may have a rocky surface with an ocean beneath the surface.

Its icy surface has ... Space Agency's Jupiter Icy Moon Explorer (JUICE) — which will also be exploring Europa, in addition to its larger cousins Ganymede and Callisto — performed a daring ...

Like many features on Mars, it isn’t static but appears to change as winds blow dust across the martian surface ... the Moon will hang between the Pleiades and Jupiter, so we’ll make sure ...

You can also easily view the moon and ... orbits), their surface diameter will appear larger and it may well be possible to discern surface detail as well brighter moons like Jupiter's Io, Europa ...

Jupiter and one of its many moons Ganymede ... believed that we could find a water ocean beneath Callisto’s heavily cratered, icy, rocky surface. Europa is covered by a cracked, icy surface ...

But it hasn’t always been this way. Jupiter’s four largest moons – Io, Europa, Ganymede and Callisto – were the first ever discovered orbiting another planet. They were spotted by Galileo ...