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

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

CNN — The Hubble Space Telescope has spied evidence of water vapor in the atmosphere around Jupiter's moon Ganymede, the largest moon in our solar system. The water vapor forms as the icy surface of ...

Ganymede, Jupiter's largest moon, is also the solar system's largest satellite, even larger than the planet Mercury. It is also the only celestial body aside from Earth (and the gas giants) to have an ...

Jupiter’s Galilean moons, Europa, Ganymede, Callisto, and Io, have long been subjects of intense scientific scrutiny, particularly regarding their potential to harbor life. Recent research has brought ...

Jupiter’s moon Ganymede is already famous for being the largest moon in the solar system. At more than 3,200 miles wide, it ...

Jupiter’s large moon Ganymede begins passing behind the planet in an occultation late on the 27th. It then travels through the gas giant’s long, dark shadow to finally pop back into view early on ...

Looking for a sky event this week? Check out our full Sky This Week column. May 21: Check in on Saturn and Mars Tonight we're ...

Jupiter still dominates the constellation Gemini, visible all night and into the early-morning hours, setting only shortly before dawn begins to color the sky. Jupiter is now highest in the southern ...