The two largest planets in our Solar System, Jupiter and Saturn, also have the largest satellite systems, or the most moons.

A half moon passes close to Jupiter on April 22, creating a striking scene.

On April 22, 2026, a rare alignment of the half moon and Jupiter will brighten the western sky, coinciding with a visible SpaceX Starlink launch and NASA’s completion of the Nancy Grace Roman Space ...

Jupiter and Saturn may seem similar as gas giants, yet their vastly different moon systems reveal a deeper story shaped by ...