New research suggests the moons of Jupiter and Uranus may hint that our planetary neighborhood once had a third ice giant.

A model based on numerical simulations reveals why Jupiter has a larger number of larger moons than Saturn. The model, developed by a team of astronomers from Japan and China, has also uncovered how ...

A new study suggests Ganymede—our neighborhood's biggest moon—still has a hot, churning core cranking out its unique magnetic ...

If you have binoculars, you may even spot some of Jupiter’s largest moons as tiny pinpoints beside the planet NICHOLAS KAMM/AFP via Getty A waxing crescent moon and Jupiter will appear close together ...