Related: Each of Jupiter's other 91 official moons has a diameter greater than 0.6 mile (1 kilometer) — but only 57 have names, and just eight have regular, nearly round orbits.

Jupiter 's already the big kahuna of the Solar System, an absolute unit of a planet with a mass 2.5 times greater than all of the rest of the planets combined. Prepare, then, to have your mind ...

One of Jupiter’s 95 known moons, Europa is almost the size of our own moon. It’s encased in an ice sheet estimated to be 10 miles to 15 miles or more (15 kilometers to 24 kilometers) thick.

If conditions are clear, anyone with a pair of binoculars or a telescope may even be able to pick out details, such as Jupiter’s four largest moons — Ganymede, Callisto, Io and Europa. The ...

A spacecraft that will study one of Jupiter’s moons launched Monday on a journey of more than six years to discover if the moon has the ability to support life. The solar-powered spacecraft ...

Of all the major planets in the solar system, Jupiter is the largest. Observers have a ring-side seat this week to view this amazing world. Jupiter reached opposition on April 7, meaning it is at ...