Add Yahoo as a preferred source to see more of our stories on Google. Jupiter's giant moon Ganymede is the only known moon to have its own magnetic field — and it may be heating up in a process "not ...

When people think about moons, they usually picture small rocky companions circling much larger planets. Ganymede does not fit that picture. It travels around Jupiter, yet it is larger than Mercury, ...

Jupiter's moon Ganymede is larger than the planet Mercury, hides a massive ocean beneath its ice, and is the only moon in the solar system known to generate its own magnetic field. For decades, ...

A new study suggests Ganymede—our neighborhood's biggest moon—still has a hot, churning core cranking out its unique magnetic field. Reading time 3 minutes Jupiter, the biggest planet in our solar ...

New observations of Ganymede reveal a striking similarity between the auroras on the largest moon in the solar system and those on Earth. The international team of astrophysicists, led by researchers ...

Young Jupiter’s powerful magnetic field may have created a safe zone where several large moons could survive. Saturn lacked this protection, possibly explaining why Titan stands almost alone among its ...

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