The largest moon in the solar system — Jupiter’s Ganymede — has a unique and inexplicable magnetic field. New research could ...

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

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. Supermoon is the popular term for a perigee full moon — when ...

The second of 2025's three supermoons will be on display Wednesday night, and this one will appear as the biggest and brightest of the year. While the celestial event can cause tidal changes, a local ...